I have never had this happen with my previous iPhones, but when I walk across carpet (either barefoot or with socks) while listening to music on my iPhone 4 while it's in my pocket I get a static discharge between my headphones and my ears. I think its a combo of the fact that the headphone jack is connected to the metal band which is touching the inside of my pockets which is collecting static buildup while I walk. And I have the Apple In-Ear Headphones which have that metal piece on the headphone piece which has a slight gap from my ear to allow for an arc discharge. Does anyone else have this weird problem? And it really is a weird feeling problem lol.