Jason Biggs -- Mocks 'Kony 2012' Honcho Jason Russell in Naked Meltdown Video

"American Pie" star Jason Biggs stripped off his clothes in the middle of a Chicago news station this morning and ran around completely naked ... in what seems to be a parody of the infamous Jason Russell meltdown video.

It all went down moments after Jason and Seann William Scott sat down for an interview for the WGN-TV Morning News.

Obviously, the whole thing was a joke to drum up publicity for their new movie ... but with Russell still in the hospital suffering from what's being described as a "reactive psychosis" ... we gotta ask ...