Bouncing up and down :)
Up and down
Up and down
Up and down
Down and up
up and down
up and down
Up-and-down
Up and down
Bouncing up and down
Bounce, up and down
Slowly up and down
Jumping up and down
Bouncing up and down
Up And Down
up and down
Up down up down
Up And Down
up and down
Up. Down. And repeat.