The Lovely Wreck
An old man who'd lived all his life back up in the hills came to visit a childhood friend. Now he'd never laid eyes on a train or the iron rails on which they run.
Standing in the middle of the tracks one day, he heard a distant whistle... WOOOO--ooo---OOOOO! but didn't have a clue as to what it meant or his impending danger.
Predictably, the old boy is hit -- fortunately it's just a side swipe, and he's thrown, head over heels off the tracks, gets off with minor internal injuries, a few broken bones, and some bruises.
After weeks in the hospital recovering, he's at a friend's place for dinner one evening. Standing in the kitchen, he hears the rising whistle of the family tea kettle wooOOO....
Springing into action, he grabs a rolling pin and mercilessly bashes and smashes the once merry kettle into a useless, shapeless hunk of copper.
His friend, hearing the fuss, rushes into the kitchen, sees what's happened and asks his friend, "Why'd you wreck our lovely tea kettle?"
The mountain man replies: "Man, you gotta kill these things when they're small."