Oh gosh, I never thought about that - them messing with the other knee while you're out but I agree with Karri, they would need you to sign off on something like that. Glad you had a good trip and unfortunately, I'm glad your old knee gave you some reminders as to why you're doing what your doing this week. As others have said, my TKR is achy, stiff, and swollen but my right knee hurts (especially when I've been on it for some time)