Earlier this week, the teen passed out after inhaling a gas found in compressed air used to clean out dusty keyboards. She then fell head-first from where she was sitting on the edge of Sherbrooke's Joffre Bridge.
She suffered a concussion and has several facial fractures, and is presently recovering in hospital.
Dr. Mélissa Généreux of the Eastern Townships' public health department said huffing substances like the difluoroethane present in keyboard cleaner is like playing a game of Russian roulette.
"We never know which time will cause a heart attack," she said.
Police in Sherbrooke said they have noticed an increase in gas huffing and are urging parents to keep a close eye on their kids and to talk to them about the dangers of inhaling such substances.