They used to be called Jumpolines until your mom jumped on one.
I’m just sayin’. History doesn’t lie; unless you make it up.
Trampoline
Have You Seen A Sandwich On A Trampoline?
This sandwich jumps for joy on his trampoline as his insides separate layer by layer. But it’s OK as he’s a sandwich and he’s made to separate. As long as he’s having fun, that’s all that matters.