That's what I told myself when I genuflected before entering my pew yesterday morning and heard an audible pop as something ripped in my left knee. It can't be my ACL because there is no swelling. What there is plenty of is pain if I take a wrong step. There's no way to know if I've taken a wrong step until after I've taken one and an excruciating pain shoots through my knee. When it's not painful, it's giving way and catching. Probably a torn meniscus. Kneeling has been a real challenge.
It's no fun getting old.