Yesterday we were a bit south of chitcago and stopped at a station to take a break.  I got to the cash register to pay for a pop and this lady barges in the front door and walks right next to me and says to the cash register.  
Lady:  "Ax-Scuse me maaam, but what is that green nozzle for"
Attendant:  "That's diesel"
Lady:  "Oh golly, what's that for?  Is that for those new fuel efficient cars?"
Attendant:  "for your vehicle"
Lady:  "well could you tell me if my car runs on it"
Attendant:  "I don't know ma'am, but I'd say whatever your manual says and whatever you normally put in your car is what you need"
Lady:  "Oh...  I normally put regular in my car"
Attendant:  "Well then I don't think you want to use diesel in your car"
Lady:  "Oh shucks, I just filled my car up with the gas from that nozzle"
At this point I can't contain myself, I am laughing my ass off and the poor girl behind the counter started in along with the other guys standing in line.  
GWS big black lady's car....