I know of someone who had a line of questioning that went something like this (the interview was at Heathrow)
"How did you get here today then"?
"By car"
"Did you break the speed limit"?
"No"
"Oh come, everyone does it, how can you justify it?"
"Have you ever tried to do 70 mph on the M25 in rush hour"
Another one I know someone got asked (this was for a US Airline)
Situation : You are about to undertake the first sector of your line check with the Chief Training Captain. You walk back up the airstairs having done the walkaround and a passenger informs you he saw the Captain drinking an alchoholic drink in a bar earlier in the afternoon. What do you do?