You know, like at the end of a phrase to lower the sustaining note pitch a bit? It's kind of a cool sound. The only thing I worry about is the neck snapping off, but other than that, it's a cool feature because the SG neck is so lanky that it probably doesn't mind. I wouldn't ever do it on an older SG with the more fragile neck to body joint. The other thing is at the end of a phrase or song, I'll grab the neck at the nut and then the body near the strap lock and then shake the guitar lightly for a cool vibrato effect. I think I saw Pete Townsend do that one time... it's another cool hidden feature of the SG. It's probably not a good thing to do if you don't have a good feel for what is safe for your guitar, but just saying it's one of the reasons I like playing a SG.