Snooki's Boozy Faceplant Right Before the Arrest

TMZ has obtained footage -- pretty painful footage -- showing a wobbly Snooki trying to get on a bicycle right  before she was arrested earlier today ... and as you can imagine ... gravity wins.

Snooki Falls - Video
Some time after the faceplant ... Snooki did something to attract the attention of Seaside Heights police ... who eventually arrested the "Jersey Shore" star for disorderly conduct.