Lynn, my DH used to have a manual transmission car and even when my legs were strong I remember how my left calf would ache after driving his car.

I'm glad you were able to get it going even on a hill. My legs shake like that if they're over-tired or have been still for too long. My son witnessed it when I was in the hospital after surgery and I had to convince him that it wasn't anything new to me and that it would eventually stop. It's pretty bizarre when it happens, though.