This morning I woke up and I checked my phone and I left my wifi on over night and my battery was almost dead. So i plugged my phone in like I always do and about 15 minutes later I get a text message from my friend and I grab my phone. When I hold my phone i realize really fast my phone was extemely hot and the front of the phone was just as hot. I've seen reviews and reports of an "Exploding iphone" so i unplugged my phone for about 30 mins. giving it time to cool down. I plugged my phone in again and now an hour later its still plugged in and it feels normal (not hot) and works fine. How come it did this?