Anyone remember jumping shoes from the 60's?

The thing I remember most about those is when the "bigger" kids got them and they just flattened the springs and didn't bounce.:D
Had a friend when I was a kid make a set of wings out of plywood and jump off a two story building.
THAT didn't end well, and you know how you are not supposed to laugh at someone that got hurt?
Yea.:rofl: