1.4. A man lets go of a bowling ball. A short while
later, he is rushed to the hospital. (JC original?)

1.4 answer: A physics professor is demonstrating conservation of energy
by suspending a bowling ball from a piece of rope. He pulls the ball back
until it’s right in front of his nose, then lets go. It is supposed to
swing away from him, then back at him, stopping just in front of his nose.
Unfortunately, he gave the ball a slight push, resulting in the ball
crashing into his nose upon its return.