Note: This has become one of my favorite jokes since I became certified as an assistive technology specialist earlier this year.
One day at a busy airport the passengers on a commercial airliner were seated waiting for the pilot to show up so they could get under way.
The pilot and co-pilot finally appeared in the rear of the plane and began walking up to the cockpit through the center aisle. Both appeared to be blind. The pilot was using a white cane, bumping into passengers right and left as he stumbled down the aisle. The co-pilot was using a guide dog. Both had their eyes covered with sunglasses.
At first the passengers did not react thinking that it must be some sort of practical joke. After a few minutes though the engines started revving and the airplane began moving down the runway.
The passengers looked at each other with some uneasiness. They started whispering among themselves and looking desperately to the stewardesses for reassurance.
Yet, the plane started accelerating rapidly and the passengers began panicking. Some passengers were praying and as the plane got closer and closer to the end of the runway the voices from the passengers became more and more hysterical.
When the airplane had less than twenty feet of runway left there was a sudden change in the pitch of the shouts as the passengers screamed at once. At the very last moment the plane lifted off the runway and became airborne.
Up in the cockpit the co-pilot breathed a sigh of relief and turned toward the pilot. "You know, one of these days the passengers aren't going to scream and we aren't going to know when to take off!"