yeah, I always did that playing baseball, and when I started coaching I started doing it with the kids.

It really helps because if someone TELLS you what you're doing wrong, you may not understand because you can't see yourself.

Like, my Dad always told me I stood too upright hitting a baseball, I never understood because I thought I was bent over quite a bit, but when I saw myself, I could compare to what I saw on tv, and I saw that I was awful upright. I could always hit to begin with, but when I fixed that, woooooo doggy.

I'm sure it's the exact same for a bow.