This fellow who had spent his whole life in
the desert comes to visit a friend. He'd never
seen a train or the tracks they run on.

While standing in the middle of the railroad
tracks one day, he hears the whistle,
“Whooee Whoee!” but doesn't know what it is.

Predictably, he's hit – but only a glancing blow
– and is thrown, to the side of the tracks,
with some minor internal injuries, a few broken
bones, and some bruises.

After weeks in the hospital recovering, he's at
his friend's house attending a party one evening.
While in the kitchen, he suddenly hears the tea
kettle whistling. He grabs a baseball bat from
the nearby closet and proceeds to batter and bash
the tea kettle into an unrecognizable lump of
metal.

His friend, hearing the ruckus, rushes into the
kitchen, sees what's happened, and asks the man
from the desert, “Why did you ruin my good tea
kettle?”

The desert man replies, “Man, you gotta kill
these things when they're small!”