“People were running on the sidewalk, the motorcycle comes flying across the street, looks like from a ramp because it was in the air,” a witness told Canadian cable network Global News.
“(The rider was) standing on the bike, slams into that building, clearly hit and out-of-control and clearly not planned.”
The witness added: “It was so out-of-control, it looked like an accident”.
The Vancouver Police Department said it and the Workers’ Compensation Board of British Columbia are investigating.
“A stunt driver has died on the set of Deadpool during a stunt on a motorcycle. VPD & @WorkSafeBC investigators are at the scene,” cops tweeted.
Deadpool 2 is a sequel to the 2016 Marvel Comics hit and stars Vancouver native Reynolds.
The movie has been shooting in Vancouver since June 26. The crew shot several complex motorcycle stunts last week on downtown streets.
Just last week, Reynolds thanked Vancouver police for all their work keeping the set safe.
He tweeted a picture of himself surrounded by Vancouver blue and the message: “Thank you #VPD. And the great people of Vancouver for putting up with road closures and traffic delays as we film Spider-Man downtown.”
Reynolds was clearly joking with his Spider-Man reference, because the title character wears a similar suit.
Thank you #VPD. And the great people of Vancouver for putting up with road closures and traffic delays as we film Spider-Man downtown. pic.twitter.com/EweL1TtM2k