Haha! That reminds me of something that happened to me a while ago. While my kids were playing in a park, I saw two guys who were trying to launch a Bixler or similar powered foamy gilder. Since I noticed they seemed a bit, eh, inexperienced, I approached them and was about to offer my help. But, alas, they tried to launch it before I got there. It nosed in immediately. When I picked it up, I noticed it weighed about four times as much as it should. It turned out they had stuffed the tail with large bolts, nuts and even a 3/4" socket. Their reasoning was that since it kept nosing in, it must have been nose heavy. The CG was just in front of the tail feathers. Upon further examination, I noticed the reason it had been nosing in in the first place: The elevator was reversed. I gave them my phone number and asked them to call me next time they tried to launch it. They never called.