I have a good joke, but it needs some explanation. So this is called a storyteller's joke, it's a joke without an answer, so the story is the joke. It depends heavily on the storyteller to keep the audience's interest, so I don't know if it will work written down. Even with that, the joke's funniness depends greatly on your (American sub-)culture. I have told to it to people and only gotten crickets. I have told it to people and have had them burst out laughing. Sooooo, we'll see if you guys like it or not.
There was once a man who was having a business deal with his friends who was a farmer. So he went to the farmer's house, and the farmer came out to meet him. The farmer told him to "just stay here for a minute, I need to take of some things inside before our deal can work," and the farmer returned into the house. The man waited for a little while, and a little while longer, and a little while longer, until he decided to explore the property a little bit. He was wandering around near the house, when he found a big, dark, hole. He couldn't see the bottom of the hole, and his curiosity got the better of him. So he grabbed a small rock, and dropped it into the hole. There was a moment of silence, and then *plink*. He heard a small splash of water. So the man went and grabbed a big heavy rock, and threw that down the hole. There was a moment of silence, and then *splash*. He heard a big splash of water. So the man looked around for anything else heavy to throw down the hole, and saw nothing. He walked a little farther away, and found a railroad tie! So he heaved it up on his shoulder, and threw it into the hole. A moment of silence, and then *SPLASH*. There was a huge splash of water. Just then, the man was interrupted by... breighing? (at this point the storyteller speeds up times two) A goat came sprinting down a hill toward the hole. The goat was zigzagging back and forth, back and forth, back and forth, it got to the hole, and it jumped right into it. There was a moment of silence, and then *SPLAASH*.
The man stood there, dumbfounded. Just then, the farmer came out. The man ran up to his friend saying "I'm so sorry! I think your goat just jumped into this hole!"
The farmer reassured him, "Oh no no, it couldn't have been my goat. My goat was tied to a railroad tie!"
If you liked it, I have many more.