Dead Poets Society

We can all agree that while it's really corny, the final scene to Dead Poet's Society is a pretty great one. But it's also one that makes no sense that it even happened at all. As in, why would Keating decide he has to come in in the middle of class to "get his things"? Wouldn't you think a teacher WHO HAS BEEN FIRED IN DISGRACE would simply think "well, they'll be outta there in an hour, I can wait." I mean, where the fuck's he in a rush to get to? Obviously, it's gonna be a while before he gets a job, so he has time to kill.

The scene as it plays is thus:

MR. NOLAN: All right, then, we'll start over. What is poetry?
(There is a knock at the classroom door.)
MR. NOLAN: Come.
(The students look back as the door opens. They quickly turn away when hey see it is Keating.)
KEATING: Excuse me. I came for my personals. Should I come back after class?
MR. NOLAN: Get them now, Mr. Keating.
MR. NOLAN: Gentlemen, turn to page 21 of the introduction. Mr. Cameron, read aloud  the excellent essay by Dr. Pritchard on "Understanding Poetry."
(Todd slowly closes his book. Keating opens the door to the tiny room off the classroom.)

And we all know what happens then: Ethan Hawke gets up on the desk and does his 'Oh Captain, my Captain!' bit before deciding he can do better than Uma Thurman, despite that very idea makes no fucking sense.

Also, why would the headmaster dude even let him in? It SHOULD play like this:

MR. NOLAN: All right, then, we'll start over. What is poetry?
(There is a knock at the classroom door.)
MR. NOLAN: Come.
(The students look back as the door opens. They quickly turn away when hey see it is Keating.)
KEATING: Excuse me. I came for my personals. Should I come back after class?
MR. NOLAN: No no, by all means, please; I love it when teachers I just fired roam around my  classroom.
KEATING: Well, I -
MR. NOLAN: Oh, you wanna diddle some more little boys, do you?
KEATING: I think that was Mel Gibson in Man Without a Face.
MR. NOLAN: Get the fuck out, Mork.
(Mr. Keating slinks out; some kid makes a fart noise)
MR. NOLAN: Gentlemen, turn to page 21 of the introduction. Mr. Cameron, read aloud  the excellent essay by Dr. Pritchard on "Understanding Poetry."
 
(Credits roll)