I found myself in the situation of having to use an old Wordlock combination lock to secure a trailer overnight. We abandoned it because it was too awkward to use - particularly in poor lighting conditions - but needs must. One problem: Forgot the code. Needed to recover it.
It's a 4-letter lock, with 10 positions per letter wheel. A quick trawl with the Linux dictionary revealed over 500 possible dictionary words, though I was fairly sure we didn't use one. So how to crack it? With one illuminated magnifying visor and a biro.