A man who comes across the trio tries to rouse the stupefied adult lying on the ground by putting him into the recovery position.
"Get up, you're frothing, bro" he tells the man, as he turns him over.
The man eventually comes to, uttering an expletive.
The video has had nearly 40,000 views since it was posted on Tuesday and has been shared widely.
Many have praised the potentially life-saving action of the person who turned the stricken man over.
Many are stunned by the footage saying children do not need to see this at their local playground.
Posted Sweedy Cassidy: "This is disturbing to the core."
"This is real and it's wrong," wrote Josh Boyd.
It comes after an earlier shocking clip captured a young woman and her partner in a comatose state after a synthetic drugs session went viral last month.
That video, shot by the woman's brother in an attempt to highlight the danger of drugs, left Ngaetu Grover so ashamed she sought rehabilitation for her drug addiction.
Drug Foundation executive director Ross Bell viewed the video and said it could show booze or synthetic cannabis use.
He said since the government changed the law in 2014 to regulate synthetic cannabis, no products had been approved and a black market had developed.
"The problem with synthetic cannabis is it is impossible to know what it is. It is not the same stuff for sale two years ago.
"The chemicals making their way into synthetic cannabis are dangerous, unknown and can be different from batch to batch, which can cause effects like those shown in the video," Bell said.
