Gross. That is really gross, dude. You're way too old to be doing stuff like this. I'm sure the "Hey loogit me y'all, I'm humpin' air. Hee haw!" routine used to be really funny back in your college days, but you're a grown-up now; a grown-up who should know that air-humping—especially while using your hands to create a phantom vagina—is unacceptable.
And wipe that goofy-ass grin off of your face, too. It's creepy.
UPDATE: via Dan Bernstein, it appears that the air-humper is strength coach Rusty Jones. Rusty Jones. This guy just got twice as creepy.