Okay, so I was using Photo Booth to take some pictures, and I had a Safari window in the background. So, I took a picture and then my computer locked up for a few seconds. I didn't get anything, not even a spinning beachball or a kernel panic message, then it just turned off. Nothing like this has ever happened before, so I was pretty scared something was broken.
I'm running Leopard 10.5.1
I'm running Leopard 10.5.1