Hmph....I've done something to a deep gluteal muscle, left side. I think I did the damage two weeks ago during Winter Break, doing a throwing form workout with the 25 pound Pataki powerball. These squats aren't helping. So I think this week is an upper body week, and I'll do some lighter weight-fast movement lower body stuff. I'm mildly grumpy about it, since I'm really gunning for that 300 pound squat, but a week of moving lighter weights, fast, isn't going to hurt me any.