Anthony Mackie is jazzed about playing the Falcon in 'Captain America: The Winter Soldier.' No, seriously, the actor is pumped about this role, and he took that joy to 'The Tonight Show Starring Jimmy Fallon,' where he basically just hysterically (but charmingly!) screamed through six minutes with the late show host.

Mackie also brought along a little clip from the Marvel movie to share -- a clip he essentially gives the 'Mystery Science Theater 3000' treatment to, simply because he can't help himself.

Mackie's excitement alone is pretty amusing and infectious, but it's made all the better by Fallon's other guest, Bill O'Reilly (of course!), sitting next to Mackie and looking utterly bewildered.