Not long ago I bought myself a new printer, changing my loyalty of many years from Epson to HP. A different way of operating, and some all singing all dancing features I haven't mastered yet. It wasn't long before I had to get to grips with a paper jam, however. I read the instructions carefully, and found that I had to turn the printer round and open up the back, then proceed to remove the trapped sheet gently but firmly. Careful as I was I lost a corner which tore off and remained in the machine.
Now, I peered into that machine from all directions. I picked it up and shook it. I shone my Anglepoise lamp right into its innards. I looked all round the floor of my workroom; the missing corner failed to reveal itself. With considerable trepidation I tried printing again, fully expecting it to jam up again. It didn't - what luck! But the mystery remains: where did that corner of paper hide itself, and will it pop up again to counfound me on some future occasion?
A month or two later I had a second jam, and without bothering to read the instructions this time, I opened the front of the printer, as I do for changing the ink cartridges. And there, nestling harmlessly in the back of the changing bay for the cartridges, was the missing corner.