Just now, out of the blue, my computer started making this large buzzing sound, the screen froze and I got the almost-blue screen of death. This one has a frowny face and says "Your computer has encountered a problem" -- it then goes to a screen that says something like 'we're checking; don't turn off your computer."
It is so darn hard to sit there and not try to turn off the computer, press ESC or do anything. The same "we're checking" screen was on for about five minutes... then it started doing updates, then it started again with updates and I was literally sitting on my hands so I wouldn't try to speed up the process. I was able to just sit there while it slowly worked its way through whatever it was. Then I had the slowest restart ever... but man, there is no better sight than how your screen is supposed to look when all is well.