You'd think after three-and-a-half seasons together, Mike would be more aware of how crazy Snooki can get when she's upset or angry. On 'Jersey Shore' (Thu., 10PM ET on MTV), he pushed her to her breaking point, and she snapped completely.
As a joke, he spread the story that he had one of his buddies back in the States call Snooki's on-again-off-again boyfriend Jionni and tell him that she hooked up with Mike. He whispers this to several people in an attempt to see who "the rat" is in the house, but his plan didn't make much sense.
Regardless, the lie got to Snooki, and she started chasing Mike around quite literally throwing wine bottles at him and anything else she could reach until Vinny finally convinced her it never happened and it was all a joke. A very expensive and messy joke by the time she calmed down.