As told by my father-in-law: Two cowboys came riding around a bend in the trail and saw an indian on the ground. His head was tilted with his ear on the ground. When he saw the cowboys he said, "Three men, large wagon, four horses". One of the cowboys asked in amazement, "You can tell all that just by listening to the ground"? "No", said the indian, "They ran over me....".
(From the "Rest" of RHF)