One lab mouse to another: I’ve trained that crazy human at last. How have you done that? I don’t know how, but every time I run through that maze and ring the bell, he gives me a piece of cheese.

A truck driver stopped at a roadside diner for lunch, and ordered a cheeseburger, coffee, and a slice of apple pie. As he was about to eat, three motorcycles pulled up outside. The bikers came in, and one grabbed the trucker’s cheeseburger out of his hand and took a huge bite from it. The second one drank the trucker’s coffee, and the third wolfed down his apple pie. The truck driver didn’t say a word. He simply got up, paid the cashier, and left. When he was gone, other motorcyclists snickered to one another and congratulated each other on being so ”bad”. As the cashier walked up, one of the motorcyclists growled, “He ain’t much of a man, is he?” ”He’s not much of a driver, either,” the cashier replied. “He just backed his 18-wheeler over three motorcycles.”

Q. Do you know what is the hardest part of learning to ride a bike?

A. The pavement.