By no means could we ever possibly condone this sort of stupidity.
Train surfing, which is typically the domain of Hollywood stuntmen, may be more popular than you think. But that doesn't make it any less ridiculously dangerous.
In the video below a man rides a train in Stockholm, Sweden, seemingly crouching beneath a bridge before jumping off of the train and into a river.
He may walk away unscathed this time, but there's about 100 things that could have gone wrong. He even gets turned around mid-air and seems to barely miss the bridge itself.
This might be fun to watch in a movie theater (or online), but it wouldn't be so enjoyable if he didn't rise back to the surface after the jump.