Jokes in machinery industry (urgent)

1. A woman walked through the parking lot and saw a driverless car coming towards her. She ran quickly to the car, opened the door, jumped into the car, pulled the brakes quickly, and the car finally stopped.

When she got off the bus, a man in a mechanic's overalls squeezed out of the rapidly gathering crowd and walked towards her.

"I stopped the car!" She is very complacent. "I know," the mechanic said discontentedly. "I'm pushing a cart!"