Oh the other thing that made me smile was when I had to take it to work and get a new pass:
Me: "May I have a new car pass please"
Pass wench: "Make, model and colour?"
Me: "Volkswagen, up! black and black"
Pass wench: "What?"
Me: "Volkswagen, up! black and black"
Pass wench: "Err..."
...and so on.