Yesterday I was showing off some Exposé and Dashboard to a friend of mine, when the weirdest thing ever happened: My mac crashed (sort off). What really happened was the screen went dim (a gray overlay came running down from the top) and a nice big dialog box appeared saying that I need to restart my computer in 10 langauges or so. I rebooted and so far all is fine. That's all it said. SO weird. Any ideas why that happened?