We have a ~$40mil library that is being constructed on campus that is nearly finished (most of the doors and door hardware have been installed), I had to go in to the building to make sure that work that my department had requested on some change orders had actually been done, and now virtually every door inside and out the building is locked... So I went to one of the construction trailers to sign out a key.
I was given a ring with two keys on it: One uncut 7-pin Yale blank and one 7-pin Yale blank that had cuts resembling those of a standard key on the university's keying system.
"Use that one" he said, pointing to the uncut blank. I asked what the other one was for, his response: "The restrooms".
I could barely hold back my laughter (...I mean, heres a $40,000,000 building that could be opened with just about anything [no pins in the cores], but the bathrooms that the crew is using seems to be fairly dificult to open without the proper key...)