Hotel guest.

[99explorer]

A woman is sitting in her hotel room when there is a knock on the door.
She opens the door to find a man that she has never seen before.
The man says, "I'm sorry. I thought this was my room."
He then walks down the hallway and gets on the elevator.
The woman then phones security to warn them that there is a burglar on the premises.
Why does she think so?

[dewman]

Why would he knock on the door of a room he thought was his.

[99explorer]

dewman - Wow! Seven minutes. That must be a record.
I was expecting someone to guess that it was a Trump hotel, and the man grabbed her by the (no man's land).