Bonecrushing sound has its roots in NanyMUD. Back in the day a large troll would hit you with a bonecrushing sound. It certainly wasn't a good thing and in most situations resulted in your character dying.
Since I spent many hours becoming a coding wizard on that Mud I found myself using that phrase quite often with friends. I have decided to apply the phrase to my current computer gaming situation whatever that may be. Most of the time it involves World of Warcraft but I imagine that will change at some point. I've played Eve Online and even SWG. Having many years invested in Wow, it is hard to change. Especially with only a limited amount of time to play.