As a longtime participant in College Bowl during college, I learned to think of trivia in threes, as many questions were three part questions ("bonuses")about something similar (ie. three different bands recorded songs called "Learning to Fly"), so whenever I see two of something unusual, I automatically think, with one more it could be a bonus.

Last night, I watched the Sam Peckinpah film Bring Me the Head of Alfredo Garcia and it contained the second driver-of-car-talking-to-disembodied-head-sitting-on-passenger-seat scene I've ever seen (the first is the Quentin Tarantino guest directed sequence in Sin City in which Clive Owen has Benecio Del Toro's head on his passenger seat). One more and there'd be a bonus...