Funniest teacher intro scene?

Perhaps the one where they piss on the ground in math class, part of what makes them funny is the way they are put together, in a sort of montage of school.

The whole interaction with their elders is hillarious as well.
From the confessions with the priest, to urinating on a man's hat at the movies... say, there's an awful lot of nicteration in this film...
"Look at your eyes; you're a toucher! Admit it"
"I'm a toucher! But it was only once..."

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The teacher of Greek, hehehe it was just hilarious how the kid couldn't pronounce (in purpose I suppose) that greek word and then the reaction of the teacher was so funny!

The Greek teacher was my favourite too.

I'm not trying to break your heart,
I'm just trying hard not to fall apart

The one talking about the pendulum. TIC - TAC, TIC - TAC.