I got a few of those.
A few years ago, at work a guy stops by trying to sell everyone some useless crap (I believe steak knives and childrens books, which is a bit of an odd combination) this was during break, an no one seemed the least bit interested, which I informed this gentelman of. He wanted to try a new strategy, trying to "get to know his clients". So he started by asking if we were a telemarketing place
"No, we build radiation detectors"
"Yes, its pretty safe as long as you take the proper precations. Are you wearing a lead cup?"
"Would you mind steping behind the yellow line" As I point out the yellow parking lines... Priceless...
My friends in the navy nuke program are considerably more ruthless. Examples include sending the new guys to the store room to collect 12 feet of felopian tubing, asking (with great urgency) to locate and escaped fast nuetron, Or asking the security marines to scan the carrier hull for leaks that may have been left by the escaping fast nuetrons. New personell are often greeted by the entire reactor crew donning their super protective suits (you know lead ones) carrying around buckets full of foaming water with lightsticks.