I was using it at 65% brightness, browsing the web in my room on the floor and... Then I had a temperature warning that said,"iPad must cool down before you can use it." or something along those lines... So I shut it off for 10 minutes (I felt the ipad right when this happened and it has been way hotter) I've had the new ipad since release day and have had it JBd since release and this is the first time it's happended. Nothing new has been added for a while. Should I say it's a fluke or are there diagnostics I should run?