A Sydney teenager who died from a suspected drug overdose at a music festival has been remembered as "intelligent", as a final video of him dancing emerged on social media.
Callum Brosnan, 19, died after attending the Knockout Games of Destiny on Saturday night — an event billed as the southern hemisphere's biggest indoor dance music festival.
The teenager was found at a train station near the festival at Sydney Olympic Park and was taken to Concord Hospital, but died in the early hours of Sunday morning.
There were several drug-related illnesses at the festival, and more than a dozen people were taken to hospital.
The three most serious cases remain at Westmead Hospital in a stable condition.
Other people were treated by authorities at Sydney Olympic Park.
Mr Brosnan, from Baulkham Hills, was remembered as a "beautiful, thoughtful, honest and intelligent" man in a Facebook tribute posted by friend Bianca Douglas.
She also shared a video of him dancing on Saturday night.
"I never dreamed that last night would be the last time I'd ever see you or hear your voice again," Ms Douglas wrote.
"You were my best friend for a long time, I told everyone you were my brother and even when we didn't see each other anymore we still looked after each other.
"You will be so dearly missed by everyone, your wise words and the memories we shared will always stay with me."
Spotlight on pill testing
At the weekend, NSW Premier Gladys Berejiklian said her Government had no plans to change its ban on pill testing, saying it gave people a "green light to take substances".
After two deaths at the Defqon.1 music festival in October, the NSW Government introduced new penalties that could see dealers jailed for up to 25 years if their drugs sparked fatalities.
The debate over pill testing comes as a new report from Durham University, in the United Kingdom, claimed the concept reduced deaths.
Professor Fiona Measham, who lead the study, said there was a "fundamental misunderstanding" of the how pill testing worked.
"We tested around 250 samples [and] about one in five were not what people had bought or expected," Professor Measham told ABC Radio Sydney's breakfast program.
As part of the program, people at festivals in the UK could get their drugs tested and receive the results in confidence — many surrendered their drugs to be destroyed.
"There was a 95 per cent [reduction] in hospital admissions that year when we were testing on-site," Professor Measham said.
"I think the key thing here is all the people who use the service had already bought the drugs and already smuggled them in and are already planning on taking them, so we're not going to be increasing drug use."
