A blonde sees a psychiatrist for a recurring dream she keeps having.
She says: “I see myself running away from lots of people in a hallway, and at the end of the hallway there’s a door and I push as hard as I can to open it, but it won’t budge!”
The doctor replies; “Don’t worry, this is a common dream. Are there any other details that you’d like to share with me?”
“Yes, there are four letters on the door that I can’t make out.”
“Do you remember them?”
“Yes… P-U-L-L”