A 757 is on its way across the Atlantic. It flies consistently at 400 knots at 30,000 feet, when suddenly an Air Force F-16 appears.
The pilot of the fighter jet slows down, flies alongside the 757 and greets the pilot of the passenger plane by radio: "Hey there, boring flight isn’t it? Now watch this!"
He rolls his jet on its back, accelerates, breaks through the sound barrier, rises rapidly to a dizzying height, and then swoops down almost to sea level in a breathtaking dive. He loops back next to the Airliner and asks, "Well, how was that?"
The Airliner pilot answers: "Very impressive, but watch this!"
The jet pilot watches the 757, but nothing happens. It continues to fly straight, at the same speed. After 15 minutes, the 757 pilot radios, "Well, how was that?
Confused, the jet pilot asks, "What did you do?"
The Airliner pilot laughs and says, "I got up, stretched my legs, walked to the back of the aircraft to use the washroom, then got a cup of coffee and a chocolate fudge pastry...