This week's dumb thing I did: I thought I would like to experiment with local voice control for home assistant, instead of the current cloud one. I thought "I wonder what the best text-to-speech voice sounds like", so I selected the most intensive Whisper model. I have Home Assistant on a Raspberry Pi, and it pretty much immediately locked up. I couldn't get into Home Assistant to disable it. I restarted it, but it automatically re-loaded it and proceeded to lock up.
I was worried I'd have to restore from a backup, but luckily I worked out there was a 30 second window between startup and lockup and so I plugged it into a monitor and used the command line to edit the addons config to remove Whisper. It ruined an evening but otherwise no harm done.