Two men are exploring in a cave when they come upon an extremely deep hole.
"I wonder how deep it is." One man comments as he kicks some dirt over the edge.
The other man picks up a rock, tosses it in, waits for it to hit the bottom but never hears anything.
The two men are perplexed and together push a large bolder into the pit and still don't hear it hit the bottom.
The second man looks at the other and says, "Hold on, I have an idea." He then runs out of the cave only to come back in with a railroad tie which he tosses over the edge.
Not 2 seconds later, a goat coming flying into the cave and jumps down the hole. Completely freaked out, the two men run out of the cave where an old farmer is scratching his head.
"Have you seen my goat?"
"Yeah! He just ran into that cave and jumped into a hole!"
"No, couldn't have been my goat. He was tied to a railroad tie."