pulled a zombie

Giving a hand job to a guy who is sleepwalking. If done correctly, the guy should be shambling about and moaning. Like a zombie.

Girl 1: My boyfriend got out of bed and started sleepwalking last night.
Girl 2: Really? What did you do?
Girl 1: I jerked him because he tells me I never do.
Girl 2: Oh, so you pulled a zombie.