An MLB fan got absolutely ROCKED by security after he tried to run onto Yankee Stadium's outfield Tuesday night ... and TMZ Sports has obtained video of the entire incident!!
The chaotic scene all went down in the 6th inning of the Yankees' game against the Angels in New York ... when a man thought it'd be funny to hop the wall and take a lap around the grass.
Turns out, though, the idea ended up being a painful (and dumb) one ... 'cause he made it just steps before he was annihilated by a stadium guard.