Flash Fiction Challenge accepted

A challenge arrived in my inbox early this morning, and I couldn't pass it up. Write a scary story in three sentences. Beginning, middle, and end, and it has to be scary.

My response:

The House

The man on the phone says, “Any moron can get into the house, but I’m the only one who can get you out, as long as you haven’t eaten or drunk anything inside.”

“Why, what happens then?” I ask, glancing from the phone to the half-empty glass in my hand.

He pauses a minute, then says, “Well, then you belong to the house.”

What would you write?