Nothing! He was just bluffing.

Billy Cole:

Well, what do we have here? Vampire-killers? [Billy begins to ascend up the stairs, and Peter draws his gun] Peter Vincent:
Stop... Stop, or I'll shoot. [Billy ignores him and continues to walk up the stairs] Peter Vincent:
I'm warning you. Don't force me to shoot! [Billy still ignores him, and Peter shoots him point blank in the head. His body collides down the stairs as Jerry begins to sneak up behind Charley and Peter. Charley turns around and draws out his cross] Charley Brewster:
STOP! [Jerry covers his eyes, whimpering] Charley Brewster:
We have him. [Jerry removes his arm from his eyes and looks down at Billy's body at the bottom of the steps] Jerry Dandrige:
Do you? [Jerry smiles and retreats; Charley and Peter are confused] Charley Brewster:
What did he mean by that? Peter Vincent:
Nothing! He was just bluffing. [Behind them, Billy rises... from the dead!]