Up and down
Up and down
Bounce, up and down
Up and down
Up and down
Up and down
Up↑ Up↑, Down↓ Down↓
Up and down, up and down
Flexing up and down
Up and Down
up and down and up and down
Up Down, Up Down, Up Down....
Up and down
Smooth up and down
Up and down
Up and down
Up and down
Up down up down
Bobbing up and down
Bouncing Up And Down