I'll never forget my High School biology teacher. It was either my sophomore or senior year, I don't know which.
Nearly every day in Southern Cali there was a group of us that got stoned before school started. Most of the time it was just available and free in the groups I hung with.
So every day, my late period Biology class came around, and I was sleepy. I would sometimes sleep in class. It was like this for months and months.
Then one day there wasn't any around, and I proceeded with my normal school day, but sober. It was on *this* day that my Biology teacher confronted me. He pulled me into the room between different classrooms and closed the door. He accused me of being stoned. At this point, I could only laugh. Here I'd been getting to his class every day coming down off a high and he choose this day, one of the only ones where I was fully sober, to accuse me!
I denied it, of course. My conscience was clear and I was very amused. This seemed to elicit an angrier reaction from him:
"I'm a biology teacher. I know these things!" Apparently, he had already called the police. They came in short order and I was escorted out of the classroom and to the main school office, where they did their tests. I got the green light for not being stoned, and was told I could go back to class. That day, I didn't bother.