One day at a busy airport,the passengers on a commercial airliner are seated, waiting for the cockpit crew to show up so they can get underway. The pilot and copilot finally appear in the rear of the plane, and begin walking up to the cockpit through the center aisle. Both appearto be blind.
The pilot is using a white cane, bumping into passengers right and left as he stumbles down the aisle, and the copilot is using a guidedog. Both have their eyes covered with huge sunglasses.
At first the passengers do not react; thinking that it must be some sort of practical joke. After a few minutes the engines start revving and the airplane starts moving down the runway. The passengers look at each other with some uneasiness.
They start whispering among themselves and look desperately to the stewardesses for reassurance.
Then the airplane starts accelerating rapidly and people begin panicking. Some passengers are praying, and as the plane gets closer and closer to the end of the runway, the voices are becoming more and more hysterical. When the airplane has less than 20 feet of runway left, there is a sudden change in the pitch of the shouts as everyone screams at once. At the very last moment the airplane lifts off and is airborne.
Up in the cockpit, the copilot breathes a sigh of relief and tells the pilot: "You know, one of these days the passengers aren't going to scream, and we're gonna get killed!"