I had a couple classmates that pretended to be vampires back in elementary and middle school. They’d pretend their Koolaid was blood, complain about the sunlight, and bite their friends a lot. Not enough to draw blood, though. I haven’t kept up with most of them, but one guy is a teacher now. He seems pretty normal.
Not a classmate but when I was in 6th grade I discovered I could make a weird noise, idk I though I sounded like a whale or a dying cow or something. It was a weird sound.
Anyway I started doing it randomly in like the middle of class but it kept seeming like no one could even hear it like no one responded at all so I just kept doing it all the time in the middle of like dead silent math classes.
I think eventually the teacher like glared at me after one and I was like oh shit they can hear it and stopped? I don’t remember.