Probably my favorite joke ever. Two guys are walking through the woods when they stumble upon an old abandoned mine shaft so deep that they can't see the bottom. Intrigued, one of them throws a rock into it to see how deep it is. After listening for quite a while, they never hear it hit the bottom. The other one grabs a bigger rock and hefts it down. They still don't hear it hit bottom. Now they are really curious how deep it is. After a minute of searching, one of them finds a huge railroad tie and signals for his buddy to come help. It takes a bit of work, but they wrestle it to the edge of the hole and push it over. Out of nowhere, a goat comes running right between them, jumping into the mineshaft! Amazed at what just happened, they start walking away when a park ranger walks up and asks them if they have seen a goat anywhere. ""Yeah, one just ran right between us and jumped into that old mineshaft over there!"" ""No, that couldn't be my goat,"" said the ranger, ""mine was tied to a railroad tie.""