Hitchhiker's Guide to the Galaxy, The - "Give Us a Hand, Marvin"
On Vogsphere, after someone (it's been a while since i saw the movie) says, "Give us a hand, Marvin," you see Marvin walking back to the ship (looking depressed as usual) without his left arm. When the others are back and trying to leave the planet, Marvin is in the middle, without his RIGHT arm!
Actually they had the right arm. When you saw his left arm off, it was because the angle was the back view not the front when walking back to the ship.
I should know, seeing as I’m watching it right now.