Noahs riddles

Riddle Count: 1
Riddle: A woman is sitting in her hotel room when there is a knock at the door. She opened the door to see a man whom she had never seen before. He said "oh I'm sorry, I have made a mistake, I thought this was my room." He then went down the corridor and in the elevator. The woman went back into her room and phoned security. What made the woman so suspicious of the man?
Answer: You don't knock on your own hotel door and the man did.
A woman is in her hotel room and hears a knock  Riddle Meme.
A woman is in her hotel room and hears a knock Riddle Meme with riddle and answer link.