Put a dodgy graphics card from the spare parts box into my computer, which was in advanced stages of denial over its VGA capabilities when I got home earlier. I've not seen one fail like that before. (Putting up a very basic POST screen, a low-resolution GRUB screen with a message that it was going to boot blindly, and then a static screen with nonsense characters. The Linux system was working fine, but claimed not to have a display adaptor. Any attempt to enter the BIOS settings screen caused the machine to lock up, presumably because it involved graphics.)
Naturally I assumed that I was going to be in for some sort of update-related UEFI[1] BIOS nightmare, so the "your graphics card is fucked" blinkenlight[2] came as something of a relief.
[1] Football is the natural opposite of computers, and nothing good can come of mixing them.
[2] Yay for over-specced g4m3r d00d motherboards. It's got ones for CPU and RAM, too.