Approaching him, one Cowboy says “Look here. These Indians can track wagons from miles away. You there, what can you tell about the closest wagon train?”
The Indian says “Large Conestoga wagon, father, mother, three daughters, headed due west at around ten miles per hour”.
“Wow!” Exclaimed the cowboys in unison. “You can tell all that by listening to the ground?”
“Nuh-uh. Ran over me half an hour ago”.