Two Hikers

Two hikers were walking through central Pennsylvania when they came upon a 6 foot wide hole in the ground. They figured it must be the opening for a vertical air shaft from an old abandoned coal mine. Curious as to the depth of the hole, the first hiker picked up a nearby rock and tossed it into the opening. They listened... and heard nothing. 
The second hiker picked up an even larger rock and tossed it into the opening. They listened... and still heard nothing. Then they both picked up an old railroad tie, dragged it to the edge of the shaft, and hurled it down. Seconds later a dog came running up between the two men and jumped straight into the hole. Bewildered, the two men just looked at each other, trying to figure out why a dog would do such a thing. 
Soon a young boy ambled onto the scene and asked if either man had seen a dog around here. The hikers told him about the dog that had just jumped into the hole. 
The young boy laughed and said, "That couldn't be my dog. My dog was tied to a railroad tie!"

Where Is My Goat

There were these two guys out hiking when they came upon an old, abandoned mine shaft. Curious about its depth they threw in a pebble and waited for the sound of it striking the bottom, but they heard nothing. They went and got a bigger rock, threw it in and waited. Still nothing. They searched the area for something larger and came upon a railroad tie. With great difficulty, the two men carried it to the opening and threw it in. While waiting for it to hit bottom, a goat suddenly darted between them and leapt into the hole! 
The guys were still standing there with astonished looks upon their faces from the actions of the goat when a man walked up to them. He asked them if they had seen a goat anywhere in the area and they said that one had just jumped into the mine shaft in front of them! The man replied, "Oh no. That couldn't be my goat, mine was tied to a railroad tie."