POP QUIZ: What is the airspeed velocity of an unladen swallow?

I’m not actually going to tell you the answer… It’s just an excuse to explain the whole “pop quiz” thing. I use the phrase “pop quiz” in my classroom when I quote movie lines to my students. In Mrs-Chandler-speak, it means “What movie is that line from?”

Example: Today in class I said “Hurray for the carbonated life forms!” …and followed it with “pop quiz.” Then a few students tried to guess what movie it was from. (The answer is Jimmy Neutron.)

I actually got the phrase “pop quiz” itself from a movie. But if I quoted the whole line, you’d immediately know which movie, and where's the fun in that?