Right leg is crossed in front, you jump up :
1. You uncross your legs
2. You cross your legs again with bringing right in front
3. You uncross your legs again
4. You cross your legs again with bringing right in front
You land in the initial position : right leg crossed in front
As you noticed, it's the same movement as the "How's your mother" except your right leg stays in front all the time.

Thanks to BIP61 for the animation.