I was using my pc last night and it was all fine, so today i come home from work, and notice my iMac's screen is cracked. How the hell can it be cracked by itself? There was nobody home the whole day, no items were laying around the screen that could have cracked it. It also doesnt look like anything has hit the screen, more like it got hot expanded and ruptured, even tho it has been turned off since 10 pm last night. Here are the images (BIG ONES) Right side of the screen around middle.