He was escaping one body part at a time.
So a man is flying a combat mission over Europe. He gets shot down and has to bail out. He breaks both his legs, is captured by Germans, then taken to a POW camp. The first week they have to amputate his right leg. He asks one of them "After you're done, can you have one of your pilots fly my leg over my base in England and drop it there?", so they do it. The next week they have to cut off his other leg. And he asks them again "Could you please have someone drop this off over my base in England?", and they do it! The third week, the have to cut off his arm, so he asks them again. This time, the german says "Nein! Dis ve can't do anymore!" And he asks "Why not?". And the german says "Ve think yoo are trying to escape!"