Justin Bieber was knocked unconscious during a concert in Paris tonight when he ran backstage between songs and smashed his head against a wall of glass.

Yet. Again.

This is at least the third time he’s done this (video of 1 and 2 here).

He was only out for about 15 seconds and finished the show without incident, and later said, “I guess me and glass windows just don’t work.” Which is worth remembering because that’s what windows are made of. So if you ever see Justin Bieber in one of those skyscrapers with outer walls made of glass, start chasing him as fast as you can.