A traveler comes across a Native American with is ear against the ground in the middle of the prarie

A traveler comes across a Native American with is ear against the ground in the middle of the prarie

The Traveler: Hey what are you doing there guy?
With his ear pressed to the ground the native american says "Two white men... 3 horses and a covered wagon... traveling north-west"
The Traveler: Wow, thats impressive! You can tell all that by listening to the ground?
Still lying on the ground the native american looks up at the traveler
"NO. thats just a description of the people who ran me over." says the native american.