The court documents claim Davis Robert Baynton, then 15, was watching the May 2011 playoff hockey game between the Vancouver Canucks and the San Jose Sharks.
"Just as the game ended, air cannons located near the roof of the arena projected confetti over the hockey rink and spectator stands. A barrel fell out of an air cannon and struck the plaintiff in the head," said the claim filed in B.C. Supreme Court.
The documents allege Baynton suffered a traumatic brain injury resulting in issues with memory, concentration and cognition, for which he continues to receive medical treatment. Baynton claims he suffers headaches, post-traumatic amnesia, fatigue and irritability.
The lawsuit names eight organizations including Aquilini Investment Group, the Canucks' owners, and Hollynorth Production Supplies which provided the air cannons.
Air cannons removed
In its response to the claim, Hollynorth denies the incident "happened as alleged" or that Baynton was injured.
The Vancouver Canucks, in a statement issued late Thursday, said the safety and security of its guests is paramount.
"The air cannons were supplied by a third party service provider. Immediately following the incident, the air cannons were removed," it said.
"This was a serious and unfortunate incident. Our immediate concern was for Davis's health and well-being, which remain the most important considerations today."
The claims made in the lawsuit are allegations only and have not been proven in court.
On mobile? Click here to read the court documents