Your butt would have probably been glowing way before your parents got to school. At least, when i was in school, mine would have been.
I got spanked with a big leather belt by the principal of my Jr. High for shooting a pea shooter (do they still have those) with 1 or 2 other guys. The school didn't tell my parents and I didn't either. I also didn't shoot any more peas in school. Or "spitwads". If you were really bad, you shot paperclips. Those really hurt.
It's a wonder I (and many of my friends) survived our childhood and youth. Boy, did we do some stupid things. I think I turned out fairly OK despite it all.