Shudder! That's a nasty looking zack (or zed-head, if you're British) behind him, too. It looks like a loooooong-dead one; they're the worst. Ick! (And speaking as a guy born and raised in the New Orleans Voodoo tradition and erstwhile captain of the Zombie Princess, believe me, I know zombies!)
If I were in that position, I'd be sweating inside my armor while rapidly drawing my katana (nukitsuke) for the killing cut (kiritsuke). But not Barack. He's cool.