<iframe src="https://player.vimeo.com/video/277211304?background=1" width="640" height="360" frameborder="0" allowfullscreen></iframe>
Beginning (gram on left) – Step back lunge then lift and touch knee at the top.
Intermediate (mom in middle) – Step back into a lunge then hop at the top while lifting knee.
Advanced (me on right) – Reach arm to opposite toe while lifting the other leg back balancing on one leg, then swing knee through and hop at the top.