He calls them Overhead Tigger Squats.
Basically an Overhead Squat with some bounces combined with shifting the weight from one foot to the other and some duck walking.
Here is the Weightlifting Talk Episode, the part is at around 9:10.
Before some of you get up in arms about it (like you alway do in Jon North posts): Try it and see if you like it. If you don’t, that’s fine too. Just don’t start flaming in the comments. It’s just one drill in the big warm up drill buffet.
Keep comments constructive and above youtube quality levels.