Truck Wreck

"Here's the scenario," the instructor announced to his class of novice truck drivers. "You're in an 18-wheeler with a heavy load, barreling down a mountainous two-lane highway. Ed, your co-driver, is asleep. There are six trucks behind you, and as you come over the top of a hill, they pull out beside you to pass. Suddenly, you see several trucks coming in the opposite direction, pulling into your lane to pass. What did you do?"

"That's simple," a student called out. "I'd wake up Ed."

"Why would you do that?" asked the instructor.

"Because," replied the student, "Ed ain't never seen a truck wreck like this before!"