Earlier this evening, I decided to upgrade my work laptop to Safari 3.1. Shortly after restarting, I was greeted with the Gray Screen of Death. To fix, I rebooted. Same result. 3rd time is a charm, right? Nope.
Rather than trying to rescue the OS or upgrade it to Leopard, I decided to watch TV for an hour instead. When I came back, I disconnected the machine from its monitor and tried rebooting on battery power. Voila - it worked!
Now I'm in the process of using my old friend SuperDuper!.
I got lucky... when was the last time you backed up?