I was returning from a bombing mission flying the A-20 Havoc. Suddenly a couple of bf109s got on my tail and fired. They scored a direct hit! Blowing one of my elevators clean off. This event violently inverted my A-20. I found myself in the dreaded inverted spin! Try as I may to recover from this inverted spin nothing much worked. So, in a moment of panic I lowered the landing gear and applied FULL flaps. To my surprise this action immediately restored the the A-20 to a somewhat level flight!