Etc.

One of the biggest highs as a teacher is when kids have a good day. Everything goes smoothly, no one gets shanked, and lots of knowledge is imparted.
It's the best feeling.
One of the hardest things is when you're in super-serious teacher mode and a child says something that is so ridiculous you have to turn around so they can't see you laughing.
For example, one of my quirkier second grade babies was having quite a time not mimicking everything I said. If I told her to settle down, she'd turn to her neighbor and, with a smile, say:
"So and so....settle down". If I told her to hand me her paper, she'd turn to her neighbor and say "Hand me your paper".
The point that made me have to turn my head was when she was the only student off-task and I reprimanded her sternly ....
Miss Jumper: "Excuse me, young lady, but I told everyone to be at a level zero noise level. That means EVERYONE. *gives her the 'I'm not even playing with you/mad mama' look*"
Quirky Girl Student: *Pauses. Looks deadpan at the large gray trash can right next to her*
"Noise level zero, TRASHCAN."
She then proceeds to her desk and works at noise level zero, as does trashcan.
I, in turn, go to the corner and act like I'm sorting papers so no one sees me red-faced with laughter.
At least she and trashcan could keep each other in check, I didn't hear a peep out of either of them for the rest of the class period.