Let's just get this right out of the way: what the fuck is going on here? Is this like auditions for the middle-school theater department's fully-clothed adaptation of The Human Centipede? Because if so, gross.
Also, if not, gross.
Then, as if the scene weren't weird enough, who is this guy leaping through the air? Furthermore, how do these people -- faces buried in each other's asses as they are -- know he's coming to get out of his way? And then why does everybody run away? Even if there were somebody around to answer them, these questions will probably never be definitively resolved. Some things are just too dumb to explain.