Yes any good locksmith will practice on oddball situations, theres nothing worse than having to think fast on a real job when things go wrong.
for example. my snapper bar broke a few weeks back rounding off the end of a thumbturn cylinder, that took some fiddling

other good things to try that iv encountered:
- deadlocking snib on nightlatch dropped with no letterbox on door.
- lever spring damage in a lever lock, ie: lever goes up and doesn't come back down
- opening a superglued lock
- missing bolt tail in a lever lock
No course can train you to deal with the things that really occur you need to use your noodle and be as prepared as possible.