My sincere thanks to everyone who commented and replied to this thread. I only wish I had looked at it sooner.
I was on my way to backing up my data to an external hard drive, but before doing so, I decided to download a couple demos and sync trophies from all accounts.
During the trophy sync, it crashed again. I'm sure you can all guess what happened on boot-up.
On this day, after four-and-a-half years of faithful service, my PlayStation 3 died.
RIP, buddy.
ORIGINAL
This just happened, and scared the living crap out of me.
Was playing Skyrim, clearing some bandits out of a cave, and suddenly my system beeps three times and crashes to a black screen. The system's light was red and flashing. Needless to say, I just about [censored] a brick.
While crossing my fingers, I pressed the power button once to turn off / stop the flashing, flipped the power switch in back to off then on again, and restarted the system. It had to "check and restore file system" to look for corrupted data, but the process was quick and I didn't lose anything thankfully. Got back to the XMB without a problem.
Anyone experience the same thing? This has never happened to me before with any of my games. I have owned this 60 GB model since launch.