So, many movies have an extra few minutes of film at the end of the credits, such as Pirates of the Caribbean. Many more movies don't. I work at a movie theatre, and often there are people waiting during the credits for that last bit, when there actually isn't one. As I stand in the shadows with my broom, wishing I could tell the people that there is nothing more to see, I wonder what movie started the whole, "but there's more lol!" thing. So, tell me, what is the oldest movie you have seen that has an extra bit at the end? [that wasn't added on after the movie was made into a DVD].
Wayne's World is the earliest one I remember.
Some notable movies tagged with surprise-after-end-credits on IMDb:
L.A. Confidential (1997)
Ferris Bueller's Day Off (1986)
I usually sit through the credits unless I didn't like the movie or I'm in a hurry.
Any easter-egg at the end comes as a bonus.
I sit through the credits out of respect for the names scrolling by... except for The Number 23, god damn, that movie was shit. Walked right out of that one.
I sit through credits when I'm alone, but if I'm with friends I don't like to make them wait if they get up to leave.