Scenes after the credits.

Some films have scenes after the credits. Currently we are playing X-men which has a brief but interesting scene at the end. I'm one of those strange people who watches the credits for every movie (unless I really have to go to the bathroom). I find it funny how the theatre is empty within about 10 seconds of credits showing most of the time. I was in California once and most of the people there stayed to watch the credits, maybe in case there was someone they knew?

Comedies, especially animated ones, tend to have scenes after the credits. Dodgeball had one that was almost a minute long.

Sometimes action/sci-fi films do as well, Constantine had one. There something similar at the end of Aliens.

I won't even get into the number of horror movies that have scenes at the end.

One of the Lethal Weapon movies had a scene at the end but the theatre I saw it in still had a curtain and it started closing partway through the scene. Whoever had set up the automation of that show I guess didn't see the extra scene or didn't care.

Sometimes Studios use the extra scene as a marketing ploy, some people went back to see X-Men again after they heard about the end. I was working in a theatre playing Monster's Inc and at one point we had to change the last reel on all the prints. Monster's Inc. was one of the animated films that had fake bloopers in the credits. Partway through the run they changed the bloopers and then ran ads to get people to see the movie again to see the bloopers. Thankfully the bloopers were really funny.