Talk about a complete 180. This fan, for whatever reason, rushed the stage while Britney Spears was wrapping up her performance of "Crazy," and actually got CHEERED by fans because he cartwheeled onto the stage.
He followed that up by flipping a security guard and getting tackled by the entire security team, to which Britney had ZERO clue, even going so far as asking the fans if they were having a good time, before turning around and frantically asking, "Is everyone OK? What's going on?"
That same dude got booed SECONDS later, as his interruption caused Britney to be escorted off-stage for her safety.