Passengers on a small commuter plane were waiting for the flight to leave. They were getting a little impatient but the airport staff had assured them that the pilots would be there soon and that the flight would soon be taking off. The door opened and two men walked up the aisle dressed in pilot uniforms - both wearing dark glasses. One was using a guide dog and the other was tapping his way up the aisle with a cane. Nervous laughter spread throughout the cabin as the men entered the cockpit. The door closed and the engines started up. The passengers began to glance nervously around, searching for some sign to suggest that this was some kind of practical joke. None was forthcoming. The plane moved faster and faster down the runway and the passengers realised that they were headed straight for the water at the far end of the airport. As it began to look as thought the plane would never take take off and that it would plough into the water, screams of panic began to fill the cabin. At that moment, the plane lifted smoothly into the air. The passengers relaxed and laughed a little sheepishly and soon they had all settled into their magazines, secure in the knowledge that the plane was in safe hands. Up in the cockpit, the co-pilot turned to the pilot and said: "You know Bob, one of these days they're gonna scream to late and we're all gonna die".