The unexpectedness. For example, when you expect a real terrifying ghost but it turns out to be something completely normal like a cat or a misbehaving child. It catches you off guard and that's where the humor comes in.
There was a girl who worked in an old library. She always felt a cold presence around the back shelves. One day, she found an old diary. Reading it, she discovered that the 'ghost' was just the memory of an old librarian who used to love sitting in that corner. The cold was from a drafty window nearby. It was a strange but funny discovery that changed the whole 'ghostly' feeling.
It depends. Some people find ghost stories funny because of the way they are told or the humorous elements incorporated. But for others, they can be scary or creepy rather than funny.
Sure. There was a man who always dreamed of being a famous singer. He practiced day and night. One day, he entered a singing competition. But when he started to sing, his voice cracked horribly. Just as he thought he would be booed off, the judges loved it because they were looking for a unique, 'bad' voice for a comical role in a musical. And he got the part and became a star in a really unexpected way.
A detective was on the case of a missing diamond. He suspected all the usual suspects in the mansion. After days of investigation, he finally found the diamond. But it was in the most unexpected place - in the collar of his own dog that had wandered into the mansion unnoticed. This was a really funny plot twist in the detective story.
Sure. There was once a group of friends at a campfire. One friend started telling a story about a lost hiker. He described how the hiker was in the middle of the forest, scared and alone. But then, suddenly, the hiker stumbled upon a magical tree that talked. The tree told the hiker that he was actually in a parallel world where all the animals could speak human languages. And in the end, the hiker became friends with a talking fox and they found a way back to the real world together.
Here's a more elaborate story. Once upon a time, there was a family that always had a very traditional Christmas. This year, they decided to do something different. They set up a trap for Santa to see if he was real. They put a sign on the chimney that said 'If you're Santa, step on this _ (magic carpet)'. Santa, being the jolly fellow he is, stepped on it and was suddenly whisked around the room. He ended up landing in the middle of the living room, laughing his head off. The family was shocked but also amused. Santa then gave them extra presents for their creativity and sense of humor. And from that year on, they always had a unique Christmas with a story to tell.
I had my car stolen one day. I was really upset. But later I found out that the 'thief' was actually a confused valet at a nearby hotel. He thought my car was part of the hotel fleet. He drove it around for a bit and then parked it in the hotel's garage. When I finally tracked it down, it was such a relief and a really funny situation.
There was a cat that was always lazy and slept all day. One day, a dog moved into the neighborhood. Everyone thought the cat would be scared. But instead, the cat started bossing the dog around and the dog obeyed. It was really funny to see such a small cat in charge of a big dog. Turns out the cat had a really strong personality.
Sure. One is 'The Gift of the Magi'. A young couple is very poor. The wife cuts her long beautiful hair to buy a chain for her husband's precious watch. But the husband sells his watch to buy a comb for her hair. It's a very touching and unexpected plot twist.