How Not To Be Seen. How Not To Be Seen [wiki] [YouTube] is a popular sketch from Monty Python's Flying Circus [wiki]. In it, the narator John Cleese stresses the importance of not being seen ...
The sketch has been remade many times, using Lego, clips from War of World Craft, and clips from Halo: Combat Evolved [all YouTube] - via Metafilter. Here it is: