Flexing up and down
Down and Up Reveal
up and down
Up, Down, Up, Down, Up, Down, Up...
up down up down up
Up-and-down
Bounce, up and down
Up and Down
Up And Down
Up And Down
Up and Down
Up down up down
Up. Down. And repeat.
Bouncing Up And Down
Up and Down
Up out and down...
Up and Down
Up and down
up and down and up and down
Up and Down