It's hard to describe but it's definitely not the mentality of intentionally trying to just rotate the hips. Like I don't consciously think about rotation or amount of rotation, etc. It is a conscious effort though to come into the plant position withthat loaded up feeling in the hips and torso. You have to be able yo feel the rotation in the hips and especially the torso and backside of the shoulder yo be able to throw correctly. The "one leg drill" (which I believe should be the "two leg drill) actually helps to promote the correct initial hip rotation.

Wouldn't Two Leg Drill just be a normal golf or batting stance starting with weight pressure distribution about equal 50/50, and shifting back to 20/80 or more? Two Leg Drill would imply equality on both legs I would think.

I believe it's called One Leg Drill because the majority of weight and rotational axis remains on front leg. Weight pressure might get to 80/20, but certainly not shifting a majority of weight back or the rotational axis. Some people also call it the Flamingo Drill, maybe the 80/20 Drill would be better for the pedants.

I just watched your video again, the part where you throw at the beginning and as the backswing happens your weight shifts to the rear foot then at reachback you transition forward with that slight turn of the hips and then your weight shifts to the front leg. It had a lot of people confused because they are thinking you try to balance all your weight on the front leg all the time during the drill. But that isn't good mechanics. There has to be a weight shift and thus you have to use "two" legs.

This is just not correct. I have great balance, and its still hard for me, but I can absolutely stand on one leg and generate ground up power into my swing.

Maybe a little but I would bet it's mostly arm.

For a bystander reading this thread, if it says ‘drill’ then it’s only a small part of the whole. Football players high-step through tires, which is ridiculous without tires on field during games. By definition a drill is not a complete and fully formed technique.

__________ (fill in the blank) drill is not the gold standard backhand stroke for use on the course. It’s... a... drill.

I agree. And in Sidewinders one leg drill, his practice throws at the beginning has him using both legs. Thus it's really a two leg drill, or should be. There is no benefit to balancing on one leg and throwing from it, that would reinforce and teach all arm mechanics.

You are 100% just straight up wrong. And honestly, this exact moment of complete wrongness might be the crux of your entire saga of 'spin' that I have read about.

Tell me, how do you initiate hip and torso rotation while balancing only on your front leg? I cant remember who it was but they showed a video and they were all arm with their arm draging their shoulders and hips around from the momentum.

The hip rotation IS the shifting of weight to the front leg.

Edit: on full throws, not up shots