Night of the Living Airhead

Chick: It freaks me out to walk around on top of, like, six feet of concrete with these trains underneath, but at least we don't have to worry about zombies attacking.
Guy: What does anything have to do with zombies?
Chick: Zombies can't walk on hollow ground, like graveyards and stuff.
Guy: That's 'hallow.' As in 'holy.'

--1 train, 116th St

Overheard by: Trying not to laugh...