Two Aussies were out hunting in the outback, and came upon a huge hole in the ground. They approached it and were amazed at its size.
The first said, "Wow, that's some hole. I can't even see the bottom. I wonder how deep it is."
The second said, "There's an old gear box over there. Let's throw it in and see how long it takes to hit bottom."
So they picked up the gear box, carried it over to the hole, counted one-two-three, and heaved it in.
As they were standing there looking over the edge of the hole, a goat come crashing through the underbrush, ran up to the hole and without hesitation, jumped in head first.
While they were standing there staring at each other in amazement, they peered into the hole, trying to figure out what that was all about.
Just then an old farmer sauntered up. "Say, you fellers didn't happen to see my goat?"
The first hunter said, "Funny you should ask. We were just standing here a minute ago, and a goat came running out of the bushes doing about a hundred miles an hour and jumped head first into this here hole!"
The old farmer said, "Naw, that's impossible! I had him chained to a gear box."