Don't invade Bruce Willis' personal space because if you do he WILL go John McClane on you.

It looked like a scene out of Die Hard when Bruce Willis exploded at a fan this weekend, turning into his tough-guy movie character and getting in the face of a too-close admirer.

We know because we saw it all unfold in backstage lounge for VIPs during New York Fashion Week. And the truth is Willis' rage was provoked - actually and literally poked!

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