Tales from the Darkside: The Movie1990

[the gargoyle has Preston in a corner outside the bar]

Preston:
[yells] No! No, please! Please, don't!

Gargoyle:
[demonic voice] Your life in exchange for a promise.

Preston:
You got it!

Gargoyle:
If I let you go, you must swear you'll never say you saw me, never say you heard me speak, never tell anyone how I look, never repeat what I've said. A promise... forever.

Preston:
You gotta be kidding.

[the monster raises its claws; growls]

Preston:
[convinced] I-I promise!

Gargoyle:
Cross your heart?

[the monster deeply scratches Preston's chest, then disappears]

Preston:
[screams in pain] I PROMISE!