Hm, I play drums, but this one still gets me. I think it's because the act of making drum strokes or tapping pedals isn't circular, whereas this thing is. I have decent (though not quite Peart-esque) 4-limb independence on my kit, but when I try this, I find it really hard to avoid switching directions without staring at my foot when I do it. Of course I also have to concentrate on my surrounding cube area so I don't have a cow-orker walk by and see me gyrating like a coked-up orangutan.