Extra Passengers

Driving past the grounds of the university, a professor saw a student
running hard. Snarling at his heels were three huge dogs. Intent on
rescue, the professor braked his car to a halt and threw open the door.

"Hurry - get in!!" he commanded.

"Thanks for stopping," the bearded youth gasped, "most people won't
offer me a lift when they see I have three dogs."