Strangest thing I've ever seen at the range (okay, so it wasn't on the range, it was just at the club, but...):
I was fairly young - perhaps 14 or 15, shooting trap with my father. I wandered back to his car at some point to get something, and a car pulled up next to me in the lot. The guy in the car indicated that he wasn't a member of the club, but wanted to know if he could sight in his "high powered rifle". I didn't exactly know the rules of the club as I was young, so I got my father to come answer this guy's question.
When my father arrived, the gentleman went into a little further explanation. "I need to sight in my high powered rifle for a mission tomorrow." Looking in the car, there's a wheelchair in the back and a jacket with a CIA patch conveniently arranged on the back of the passenger's seat so as to be very obvious. We told him he'd have to talk to an officer of the club and that we didn't know that any were around, so he should try calling later. Looking back, we probably should have called the police for impersonation of an LEO.
Though I still wonder what sort of "mission" a "CIA Operative" with a wheelchair needed to use a private gun club to sight in his "high powered rifle" the day before.