The man started rubbing the sides and top of his head, slowly.
Okay... no horns or other demonic growths...
He then stood up against the diner, placed his hand on top of his head, and stepped away, leaving the hand in place.
Not a giant.. So why did they run away?
The man looked around, then realised the doorway he had leapt through was gone, and that the door was lying broken at his feet.
"Guess that explains it..." he muttered.