"My clients wear knee braces during plyometrics to prevent that sort of injury."
Auntie Jo just made up a new rule. I am pretty damn hardcore in my workouts, but I will stick to this one:
If you have to have protective equipment to prevent a lifelong injury *while working out in your own home*, YOU ARE DOING IT WRONG.
In lighter news: My new trick knee went out from under me last night at work, causing me to lurch forward suddenly. The patient whose room I was in looked up from the bed and said, "Oh! I didn't realize Toyota was making legs now!"