Terrible German Pilot

Okay, so you, the joke author, are probably not the sharpest tool in the shed. Your grandpa wasn't *actually* killing his own side, right? You know, it's like saying someone is the 'worst chef' because they make too many good meals. He was so bad at being a German pilot that he accidentally took out 100 of his own guys. It's irony mixed with a little dark humor, because, you know, it's war. Get it now?