the look of fear in other photographers' eyes (usually g/gwc's) is classic when I have my RB with a 180, prism, grip and flash in my hand.
A few years ago I photographed a wedding for a friend with my RB67. As we were leaving the registry office, the next wedding party was coming in. The digi-photographer with them gave my RB67 a "what on earth is that?" look.
"People who say things won't work are a dime a dozen. People who figure out how to make things work are worth a fortune" - Dave Rat.