Credit: Scott Gries/Picture Group

We've got a situation here: Jersey Shore mania is getting dangerous!

A Friday night appearance by the cast of MTV's Jersey Shore caused major melee at a nightclub in Montclair, NJ, the Associated Press reports.

With the hopes of meeting the reality stars, about 2000 fans crushed the 501 Lounge -- which has a capacity of only 800. In the ensuing chaos, four people were arrested on charges of disorderly conduct and drunk driving, and the cops eventually shut down the street outside the nightclub for two hours.

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No word on how Snooki, The Situation and the rest of the cast fared during the crazy evening.

Thursday's season one finale (and a drama-filled reunion special) of the series scored an astounding 4.8 million views.

TMZ claims that the cast is in currently playing hardball with MTV to negotiate their per-episode salaries for season two. The website cites anonymous sources as saying that the housemates have yet to respond to the network's alleged new offer of $10,000 a show. (Some cast members of The Hills, by comparison, make over $100,000 an episode.)