Grenades, gorillas and guidos, oh my!

The first trailer for the 5th season of "Jersey Shore" is here -- and the cast is home from Italy and  spending the summer where it all began, Seaside Heights, New Jersey.
In the promo, we see Snooki peeing in the backyard, Vinny saying he's leaving the house for good and even a full-out bar brawl that leaves The Situation bleeding from his head.
This season looks like a hot blackout mess. Check out all the madness above! 

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