I just purchased a Pontiac G6 2007 and took it for a ride. We stopped at our destination (1 hour away) for a bite to eat, came home, turned off the ignition. I forgot to put up a window so turned the key and got nothing, not a sound. Turned off the key and attempted to start it, nothing again! After a little bit of discussion my husband decided to disconnect the battery and everything is working perfectly again. Any Ideas as to what happened?