In a scene probably reminiscent of Bret Michaels getting knocked to the ground at the Tony Awards or a bird slamming into a sliding glass door, Justin Bieber was knocked to the floor when he ran straight into a glass door during a concert in Paris last night. He fell to the ground but still finished the show. Later, after the show he apparently passed out for about 15 seconds and doctors say he suffered a mild concussion. As much as I give the guy crap, you have to admit most performers would have called it a night after being dropped to the ground last night. I wish there was some video of it somewhere.