Short Term Memory Loss Can Be a Real Drag.

Hobo: Excuse me, sweetie, can I bum a cigarette?
Female tourist: Eh… I already bummed you one.
Hobo: Oh, you did? When?
Female tourist: About eight minutes ago.
Hobo: Really? (proceeds to take pack from his pocket, pulls a cigarette and lights up) I must have forgot.

–Spring & Broadway