Ass = Kicked

Jeeeze... I was beat up this morning by my class at the gym. I attempted "Bounce", which sounds innocent enough, but is pure evil squeezed into an hour. First you have to do these drills on a little trampoline and bounce really fast. Then you use this contraption called the "BOSU" ball to do all sorts of evil pushups and lunges, etc..... I have never sweat so much in my life. I knew joining Crunch would force me to do intense workouts and I was right. Maybe I'll do water aerobics next time.
The thing she is standing on is a BOSU ball.
and
This woman is modeling next to the "Rebounder". I hope I don't have to bounce any more today!