Sherlock Jr.

Out of the few Keaton films I've seen, this one has emerged as my absolute favorite. Keaton's flair for visual trickery is on full display in this film, as is his gift for physical comedy. The sequence with the motorcycle is one of the most brilliantly sustained bits of hilarity I have ever seen. If you've never seen Keaton before, do yourself a favor and rectify that post haste, and this is a great place to start.