An anesthesiologist lets this guy knock himself out right on the table.
Goodnight, sweet dreams...
Why you shouldn't daydream and ride a bike at the same time.
Any kid that comes across a dead tree in the forest will always try to knock it over. He just gets unlucky.
A bully attacks another girl and knocks herself out. Karma is a bitch.
This girl spit in a guy's face and tried punching him. She got instant karma.
And the Darwin award goes to...
This chick is knocked out cold when they collide with exercise balls.