I did
Squeeze: Lower Body Challenge for the first time yesterday. It was really, really challenging! Towards the end, when I didn't think I could take any more, I noticed a pink ball next to Tracy's dumbbells and thought "Gah! What more torture does she have in store for us?"
It's just her "trademark" from her first DVD but it freaked me out for a moment.
ETA: I loved Tracy's artwork - helped take my mind off the pain.