I used to think the nice old guy who lived next door when I was a kid watched me play on the trampoline because he was a nice man. Now I’m older I wonder if it might have been something else....😳
If by "kid" you mean teenager, and you had breasts to bounce, then that's a little more likely, but a kid on a trampoline doesn't have anything to show more than anywhere else
Breasts and booties will bounce and put on a show when you've gone through puberty and they get jiggly though