An elderly man on a Moped, pulls up next to a doctor at traffic lights.
The old man looks over at the sleek shiny car and asks, "What kind of car you got there sonny?"
The doctor replies, "A Ferrari GTO, it can do up to 320 miles an hour," he said proudly.
"Mind if I take a look inside?"
"No problem," replies the doctor.
So the old man pokes his head in the window and looks around. Sitting back on his Moped, the old man says, "Nice car, but I'll stick with my Moped!"
Just then the light changes and doctor floors it to 160mph. Suddenly, he notices a dot in his rear view mirror getting closer. He slows down and suddenly WHOOOOSSSHHH something flies past him. He speeds up to see what it is and up ahead of him, he sees the old man.
Amazed that the Moped could pass his Ferrari, he gives it more gas and passes the Moped at 275mph. He's feeling pretty good until he looks in his mirror and sees the old man gaining on him. He takes the Ferrari all the way up to 320mph.
Again, he sees the Moped bearing down on him. The Ferrari is flat out, and there's nothing he and do! Suddenly, the Moped ploughs into the back of his Ferrari.
Unbelievably the old man is still alive. He runs up to the banged-up old guy and says, "I'm a doctor.... is there anything I can do for you?"
The old man whispers, "Unhook my braces from your side view mirror!"