The Dick Van Dyke Show opening titles
The show was an excellent vehicle for Dick Van Dyke’s physical comedy and sight gags. The classic example is the scene in the opening titles, in which Dick enters through the front door and trips over the ottoman.
Producers filmed three versions: one in which he trips over the ottoman, one in which he steps around it, and a rarely seen third variation in which he avoids the ottoman and then trips on the carpet.
According to Dick, viewers used to make bets during the opening titles on whether or not Rob Petrie would trip over the ottoman, coming into the house.
(Source: frdirector, via always-fair-weather)