Teachers do have a lot of resilience to come to school and teach us all day. Especially if they work at a bad school and the kids are NUTZ like at my school.
I can't remember if the kids were that bad at mine. We could have had a crazier reputation I think. I was very lucky, I think in my whole time in high school there was only one teacher I didn't like. Some I didn't care for that much but most of them were awesome.
Once in my school my Spanish teacher left the classroom to talk to her boyfriend and a wasp flew into the building (the building was infested with wasps) and some kid killed it and set it on fire. They then put drops of hand sanitizer in their hands and set that on fire. The teacher eventually came back into the class room and didn't act as if she even noticed the smoke smell in the room. I went to an inner city school, so there were some pretty crazy stuff happening in that school