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 under
way. The pilot and co-pilot finally appear in the rear of the plane,
and begin walking up to the cockpit through the center aisle. Both
appear to be blind. The pilot is using a white cane, bumping into
passengers right and left as he stumbles down the aisle, and the
co-pilot is using a guide dog. 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. However, after a few minutes the engines start
spooling up and the airplane starts moving down the runway. The
passengers look at each other with some uneasiness, whispering among
themselves and looking desperately to the flight attendants 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.

Finally, 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, and at the very last moment the airplane lifts off and is
airborne.

Up in the cockpit, the co-pilot breathes a sigh of relief and turns to
the Captain: "You know, one of these days the passengers aren't going to
scream, and we're gonna be in trouble!"