gnu - I woulda showed her "Little Tommy" (my Thompson submachine gun) and said "Tommy says you got too much stuff in yer cart for this line. Move to the other line before Tommy gets really mad."

Actually, the gun that works best for this is a pump shotgun. You pump it once to load a round in the chamber and it makes that sound. People are always persuaded.

See the hotel scene with Steve McQueen and Ali McGraw in "The Getaway" for a great demonstration of the maximum persuasion a pump gun can provide.

- Chongo