HOW: Get set up in a standing position with your hands on a wall in front of you for support. Begin the exercise by bouncing from one foot to the other on the balls of your feet and repeating as if you were jump roping/hopping in place.
FEEL: You should focus on maintaining a rigid/stiff foot/ankle as well as your legs, think of this exercise like you're bouncing on a pogo stick. You want to keep your legs stiff so that you 'bounce' like you're bouncing on a stiff spring.
COMPENSATION: Do not let your knees excessively bend or your heels touch the ground, stay stiff and bounce on the balls of your feet.