I'm sure I did it when I first played a few times (~3-4 years ago), but never gave it any thought.
It really reared it's ugly head last year, right around the time I started to play some decent golf. It first creeped up on the short, awkward pitch shots. You know, those 40-70 yard shots where you're deciding between a low, spinning sw, or a higher, fuller lw?
Well, since then, and because of all the mental scarring it has done to me, I find it hard to relax on those shots. Even when I go quite a while without doing it, I still get that anxious feeling when I'm over that type of shot.
It's easily cost me 3-4 clubs, and one tire tube on my Sun Mountain cart.