When printing carefully selected pages from a 5386 page document, do not transpose digits when entering the print page data.
Otherwise you will watch in horror as your computer cheerfully tries to spool umpteen bazillion pages to the printer and you will frantically stab at any button you can find in an effort to stave off the impending paper apocalypse.
Why no, I have no personal experience of this. Why do you ask?
Somehow in outlook, I apparently asked it to print my inbox, rather than a specific email. Good thing I noticed the rapid page count it generated in time to yank the paper supply (from a shared office printer) which then bought me time to figure out how to cancel the print, and to get the cancel to go all the way through. I still wound up with half a dozen pages of inbox.
The receipt printer at a retail establishment that I used to work at had this funny quirk, in which, if the printer became disconnected from the computer (which happened a lot due to the cord tangles we had going on behind the counter) and you kept telling it to print receipts, when you finally reconnected it, it would spew blank receipt paper to the tune of 6" for every 1" of receipt it had been told to print. Once other people had been operating it for awhile and complaining about the receipts not printing, and I reconnected it and watched while it dispensed half a roll of receipt paper. Removing the paper entirely didn't help - it would just complain about the lack of paper until you filled it again, and then continue wasting paper. Sometimes restarting the computer helped, but not always, and we didn't always have time to do a restart anyway. We could look up receipts later for people, and most of our stuff wasn't returnable, so it wasn't a big deal, but it was annoying.
I would like to nominate my recent decision to cook marinated kebabs on my airbake pizza tray. It is, basically, a large round cookie sheet perforated with many small holes, so that pizza crust gets super crispy. I usually cover it with foil when I'm just using it for general purposes, but I failed to do so this time. My house still smells faintly of the smoke (no fire, but lots of smoke!) produced from the drippings off the kebabs landing on the heating elements.