When I was in middle school, a classmate did something really terrible that I will never forget in my life.

During class, he asked for leave to go to the bathroom.
When the teacher asked where he went during the break, he said he didn't have time because class was running late.
The teacher told him to hold it, and if he couldn't hold it, to just pee in his pants.
And he actually did.
Some came out of his pants, and he stepped on it with his foot, spreading it all over the floor...
The desk mate directly looked like he was going to vomit.
The teacher walked over, smelled the odor halfway through, and ran out.
The classmates also ran out, vomiting as they ran.
Later, the classmate's parents came and blocked the office door, shouting inside, "If you have the guts, don't come out!
If you need to go to the bathroom later, just pee inside."