This guy is about to go from furious to humiliated quicker than the time it takes to say "pantsed."

We're not sure why the man is so angry, but he looks like he's about to tear this train car to pieces and maybe take some innocent bystanders along for the ride (including the woman sitting in the seat).

That's when another passenger coolly arrived on the scene to put an end to his destruction with a classic prank among kids that is totally underutilized once we become adults.

Why this isn't encouraged in anger management is beyond us. It should be required that you tell anyone you're with that he or she should pull down your pants the minute you start going Charlie Sheen on anyone.