i am really sorry to admit this publicly but when I was a kid, I hit my little sister with my violin bow. I lost my temper.
Then one other time, she was taking a nap on the couch, and I thought it would be sort of funny, if…I went up to her ear and blew my trumpet real loud. She didnt think so.
Another mean thing we did as kids was call people up (before caller id was invented) and pretend we were some little kid they had in their life. Like when they asked who it was, I’d say “Guess” as if i was just being heimishe with them. So they’d say a name and I would say “yep”. THen they’d ask me how the wedding was, and what mommy was doing. And I’d answer all weird, not normal answers. and we’d tape record it and laugh for days listening back at it. We were like 11 or 12 years old.