Don't fly by your belly button.

FORBES: Magazine Article

This is a walker which has front legs that adjust on the fly with the press of a button, making it possible for a person to use the walker to help get up and down stairs.

FORBES: Innovation For Accessibility

Therefore you're focused on just the most basic movements -- a common one involves jumping in the air, tapping the other button for the downward kick, and then tapping it again to fly backwards.

ENGADGET