Paul Wall -- I Witnessed a Burger Brawl!

Rapper Paul Wall got a few more buns than he bargained for at a Whataburger in Texas recently when some dumbass was de-pantsed in a late-night brawl over a cheeseburger.

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According to World Star Hip Hop, Paul rolled through the fast-food joint after a reunion show with Chamillionaire, when some pissed off burger-eater started yelling at employees and patrons -- at one time screaming, "f**k you and your cheeseburger!"

Just watch.