Remember the YouTube video 'David After Dentist', where the little kid freaked out? Well, a similar video from a few months ago is getting a bunch of attention.

It's a teenager named Tyler who broke his arm playing hockey, so the doctors him on drugs to re-set it. And while they're doing it...he can't stop LAUGHING.

First, he cracks up and says everything's in slow motion. Then there's about three minutes of total nonsense. But you have to wait for the end, because when his dad tells him he's a good hockey player...he suddenly starts CRYING.

At :52, he says his laugh sounds like The Joker from Batman. At 4:27, he says 'I love you, Daddy'...then starts crying: