Uways Hussain, 20, of Marley Road, Manchester, was jailed for 11 years and eight months after admitting causing death by dangerous driving and other offences.
Passenger Usmon Mahmood, 23, of Buller Road, Manchester, was sentenced to 12 years and nine months for aiding and abetting Hussain.
He initially claimed he had tried to warn his friend about the way he was driving his VW Golf GTI.
Sylvester Abayomi, 50, was killed in the crash, which happened at the junction of Green End Road and Kingsway in Manchester on 9 March.
The car drove at speeds well over 100mph in 30mph zones throughout the night.
Footage on their phones captured their speeding and showed the pair inhaling nitrous oxide, also known as laughing gas, from balloons.
At times, Hussain had only one hand on the wheel.
Greater Manchester Police said it was believed to be one of the first times nationally where a passenger has been convicted for aid and abetting death by dangerous driving.
The pair were unwittingly recorded in conversation in the moments after the crash by an automated feature on Hussain's Apple Watch.
The collision prompted the device to call 999, then captured audio of them discussing fleeing in an Uber and reporting their car as stolen.
Judge Nicholas Dean KC said the CCTV and camera footage of the incident were "terrifying".
He told the pair: "You drove at extreme speeds, seemingly up to very nearly 140mph, on roads which were by and large subject to 30mph speed limits, far, far in excess of any safe or lawful limit."
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Mr Abayomi's partner, Denise Doyle, told Manchester Crown Court: "Sylvester was simply on his way to work. An ordinary hard-working man.
"He should have returned home to me safely that day. Because of your actions he never did."
Addressing the defendants, she added: "You left Sylv to die alone. You did not show him even a shred of compassion or humanity."
The court heard Hussain - a law student - had a previous conviction for drug-driving, while Mahmood had been about to start a Network Rail apprenticeship.
Emergency services were called to the scene on Churchyard Row in Elephant and Castle, following reports that three people had fallen from a height.
Attempts by emergency responders to resuscitate them were unsuccessful.
The Metropolitan Police said their deaths on Wednesday were being treated as unexpected.
"At 7.29am officers, the London Ambulance Service, London's Air Ambulance and the London Fire Brigade attended a high-rise block of flats on Churchyard Row, Elephant and Castle, following reports that people had fallen from height," police said.
The force added: "At the scene, three people - a man, a woman and a child - were found to have sadly died, despite resuscitation attempts by first responders. Their deaths are currently being treated as unexpected."
Officers said there were no other reported injuries.
Work is under way to formally identify the three people who have died.
Their next-of-kin have been informed and were being supported by specialist officers, police added.
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A London Ambulance Service spokesperson said: "We sent a number of resources to the scene including ambulance crews, a paramedic in a fast response car, an incident response officer and paramedics from our hazardous area response team (Hart).
"We also dispatched a trauma team in a car from London's Air Ambulance.
"Our first paramedic arrived in around four minutes.
"Very sadly, despite the best efforts of our crews, three people were pronounced dead at the scene."
Police have urged any witnesses with information to come forward.
Kenneth Law sold the lethal substances across the world, including the UK.
The 60-year-old was facing 14 counts of aiding suicide, all relating to Canadian victims.
He pleaded guilty to aiding suicide charges under an agreement with prosecutors that would see the murder charges withdrawn.
The Canadian national will not be tried in the UK, because prosecutors fear a court may reject his extradition under "double jeopardy" laws - because he will have already been convicted of similar offences in another country.
Specialist Crown Prosecution Service prosecutor Andrew Hudson said including UK victims in the Canadian sentencing process was the "quickest and most effective route" to securing justice.
The National Crime Agency (NCA) and the Crown Prosecution Service (CPS) said 79 UK victims who died as a direct result of purchasing Law's products will form part of the wider case into his offending.
After his Canadian convictions, British prosecutors said Law was a "serial offender who callously exploited many vulnerable and innocent people exchanging their lives for his financial gain".
He sold 1,200 packages to 40 countries from Canada-based websites, with 286 individuals in the UK receiving the products, leading to 112 deaths.
In a letter to bereaved families, the NCA and CPS said it had been established that Law sent 330 products to the UK in total.
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Explaining why the UK victims would be taken into the Canadian case, the letter said: "We recognise that this may be painful to hear, and that some victims and bereaved families may have hoped to see a separate prosecution in England and Wales.
"This difficult decision was reached only after detailed consideration of all available options."
The families of those who died have now called for a public inquiry.
The sister of Aimee Walton, a 21-year-old from Southampton who died in 2022, said "doors have been shut" for families seeking justice.
Adele Zeynep Walton said: "The question for our own country is simpler still - who here will examine how the British state let this happen, and what it will do so that no other family goes through it?
"A foreign sentencing hearing cannot answer that. Only a statutory public inquiry can."
David Parfett, the father of philosophy student Thomas Parfett, who died aged 22 after taking his own life in Sunbury-on-Thames in Surrey, said: "I am angry, but I am not surprised. For months, we have been told that the system is working and that existing measures are enough. They are not.
"If our own country will not put anyone on trial for these deaths, the very least it can do is hold a proper inquiry into how they were allowed to happen."
Law was also investigated by police in the US, Italy, Australia and New Zealand.
Anyone feeling emotionally distressed or suicidal can call Samaritans for help on 116 123 or email jo@samaritans.org in the UK.
Police recovered his body after being called to Bracklinn Falls, near Callander, Stirlingshire, over concern for a person at about 6.45pm on Thursday.
The death is not being treated as suspicious by Police Scotland.
High temperatures have attracted many to open water swimming, and there have been fatalities in South Yorkshire, West Yorkshire, Cornwall, Hampshire, Warwickshire, Cheshire, Pembrokeshire, Lincolnshire and Lancashire.
On Thursday, two further open water related deaths were confirmed.
Thames Valley Police said that a 14-year-old boy died after getting into difficulty in the River Thames at Donnington Bridge on Wednesday.
Around the same time, the body of another teenage boy was recovered from a pond in Swanscombe, Kent.
The Royal National Lifeboat Institution has issued a water safety warning following the spate of deaths, urging people to follow key safety advice if they find themselves in trouble in open water.
It warned that: "While the sea or open water may look inviting during hot weather, it remains dangerously cold, putting even the strongest of swimmers at risk of cold water shock."
Cold water shock is a physiological reaction that happens when a sudden change in skin temperature occurs - for example, from hot air to cold water.
It can cause uncontrollable gasping and an increase in blood pressure and heart rate, which can lead to panic and drowning very quickly.
The UK has seen a historic May heat wave, with temperatures of over 30C being recorded six days in a row.
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Sky News weather presenter Kirsty McCabe said that while temperatures will now drop, South East England will still see warm temperatures of 28C or 29C on Friday and Saturday.
However, in Scotland and Northern Ireland, cloud and outbreaks of rain are expected to move in, with some thundery downpours possible.
Much of England and Wales will remain dry and sunny.
Jemele Rhone has been charged with murdering Shanice Brookes, 30, along with possessing a firearm and criminal property - namely £10,000.
The mother-of-one was shot dead near the One Four One bar on West Street in the early hours of Bank Holiday Monday.
She was taken to hospital but later pronounced dead.
Rhone, 30, did not appear at Sheffield Magistrates' Court on Friday after his solicitor said he had asked to stay in the cells due to his "mental health".
District Judge Tim Spruce agreed and remanded him in custody. Co-accused Deiryen Dyce, 32, did appear and was flanked by three security guards.
She is charged with assisting an offender, possessing ammunition, possessing heroin, cocaine and cannabis with intent to supply, and possessing criminal property (£2,000).
Dyce was also remanded in custody and both defendants are scheduled to appear again at Sheffield Crown Court on Monday.
Prosecutor Oliver Farrell said Rhone was accused of firing the shot that killed Ms Brookes, a charity worker who was also doing an arts degree and had a 10-year-old son.
Mr Farrell said she was an "entirely innocent bystander" and that Dyce was accused of helping Rhone "post incident".
Ammunition found on Dyce had been linked to cartridges found at the scene and both of the accused were arrested on the A555 Manchester Airport link road, the prosecutor added.
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Detective Chief Inspector Andy Knowles, from South Yorkshire Police, said: "Shanice was an entirely innocent bystander who should've been able to enjoy a night out in our city without the fear that she wouldn't come home safely."
Sheffield College principal Angela Foulkes said Ms Brookes had been preparing to exhibit her final work ahead of graduating and called her an "exceptional student"
"Her creative potential was clear to everyone who worked with her," she said.
The community charity she worked for, Zest, called her "a truly beautiful soul who touched so many lives".