Wow, people sure did have specialized professions back in the day.
"What do you do?"
"Oh, I'm a bellowsfarmer. I take care of the church organ. I can clean the hell out of that thing.
.. ... n-no, I can't actually play it. I don't know how. .. no, I don't know how to clean organs that don't belong to churches."
I like this one, too:
BLINDSMAN - employed by the Post Office to deal with incorrectly addressed letters and parcels
Masquerading as a normal person day after day is exhausting.