'Jersey Shore' Fight -- Jwoww on Crutches

The "Jersey Shore" brawl that went down Friday night had some collateral damage -- Jwoww was seen yesterday hopping around town on crutches!

As TMZ first reported, two guys claim they were sucker-punched by Ronnie and a few of the fellas from "JS" ... but sources close to the guys tell us they did not throw the first punch.

Seems Jwoww got caught in the crossfire, as she was seen with her foot heavily bandaged and using crutches. One source told us she suffered a sprained ankle.