So me and my girlfriend drove to Florida (from Oklahoma) for vacation. On the way back, I decided to use my iPhone's map application for some GPS action while also playing music. About 30 minutes later from when I initially started, my phone quit playing music. I looked up and it came up with some kind of temperature warning that I've never seen before which took up the whole screen (I tried to get a screenshot of it but it wouldn't let me but I did find this picture on the net). I took my phone out of the window mount holder and the back of the phone was really really hot. I've never felt it this hot before...I thought the back plastic casing was going to melt off because of how hot it was. It kinda freaked me out so I turned it off for an hour and decided not to use my phone for GPS for long periods of time. Anyways, has this happened to anyone else? I'm thinking about taking it to Apple and making up a story saying that it happens all the time even after a restore in hopes of getting a new one because I'm afraid that kind of heat may have just shortened my iPhone's lifespan.