Broken guitar blues

Ok it's official I must have a poltergeist in my house. On Saturday I was jamming with Adam and placed my Les Paul in my guitar stand after we finished playing. As we were packing up Adam's things the guitar suddenly fell over and landed on top of my pedal board. No one was near the guitar when it fell. It just decided to fall by itself. Anyways I quickly picked the guitar up and first inspection it looked fine. When I turned it over however I was horrified to see that the neck had broken right at the point where it meets the head. I've had this guitar since 1997 and it was in almost perfect condition despite all the playing. Today I brought the guitar into MusicStop. The guy there said it looked like it could be repaired. The guitar tech will be in tomorrow and I'll know for sure what I'm looking at. Hopefully it won't cost too much to get repaired. I just can't figure out how it feel over. I think it is possible that the wood had a defect or something that just finally caused the neck to break which would have caused the weight to shift and thus the guitar to fall over. Either that or I have a poltergeist. So that kinda made for a crappy weekend. I sent an email off to Gibson explaining the situation. I believe this guitar has a lifetime waranty on it but I doubt that they'll do anything. Still, it can't hurt to try. I'll know soon enough what the future has in store for my Les Paul.