I got asked the one about the capt in the skirt at an interview for GIll Air years back, fortunately I'd heard it off a mate, so I played dumb a bit (not too difficult for me), I paused for a moment or three and blurted out the right answer, ie ask her what she wants to drink.
One of the worst on that I came across, and it's a common one is to give an example of your weakness. I just patted my stomach (which is larger than it should be) and said chocolate.