An American scientist once visited the offices of the great Nobel Prize-winning physicist, Neils Bohr, in Copenhagen, and was amazed to find that over his desk a horseshoe was nailed to the wall.
The American said with a nervous laugh, "Surely you don't believe that horseshoe will bring you good luck, do you, Professor Bohr?"
Bohr chuckled, "I believe no such thing, my good friend. Not at all. I am scarcely likely to believe in such foolish nonsense. However, I am told that a horseshoe will bring you good luck whether you believe in it or not!"
A local laboratory employed a licensed boat captain to man its research vessel. Reportedly, the captain couldn't swim. A newcomer, learning of this, approached him about it.
"Is it true?" the newcomer asked incredulously. "You, a boat captain, can't swim?"
"No I can't," the captain replied. "Can pilots fly?"
One day a man walked into a barbershop wearing headphones. ”Give me a trim,” he said to the barber, “but don’t take off my headphones off or I’ll die.”
As the barber began to cut the man’s hair, he realized the headphones were in the way and took them off. A few moments later, the man slumped to the floor dead.
Picking up the headphones, the barber put them to his ear and heard a voice saying, “Breathe in, breathe out, breathe in, breathe out...”