I did a 90-minute clinic yesterday devoted solely to backhands. We hit *a lot* of backhands. It was a good class. I noticed about halfway through that my right butt-cheek was getting sore from being smacked with the frame of my racket on my follow-through. I am wondering whether this means anything (other than that I have a Big Butt). Does it mean I'm not extending enough into the ball? Or is it normal for the racket to hit your behind? I have noticed it in matches and practice, but it doesn't bother me. I noticed it yesterday because I hit so very many backhands.