Funny dark stories often have an element of surprise. For example, you might expect something truly terrifying but then it turns out to be something silly or unexpected like in the story of the haunted house that turned out to have raccoons having a party. They also usually involve a bit of mystery at first, which makes the reader or listener intrigued.
To write such stories, focus on contrasts. Make the dark situations have humorous twists or have the characters react in funny ways to the darkness. Also, use witty dialogue to lighten the mood.
Maybe there was a 4chan story where a person was so scared of the dark that they made a 'protective circle' around their bed with toys before going to sleep, believing it would keep the 'dark entities' away. But in the middle of the night, they rolled out of the circle and panicked until they realized it was all in their head. It's quite a funny take on the fear of the dark.
One funny story is about a player who accidentally mistook a friendly NPC for an enemy and spent ages trying to defeat it. When they finally realized their mistake, they felt so silly. The NPC just stood there looking confused as the player was attacking it with all sorts of weapons.
A popular one is about a vampire who was on a diet. He only drank diet blood, which he thought was healthier. He would complain to his bat friends that regular blood was too fattening. It's a simple yet darkly humorous concept as we usually think of vampires as being all about drinking blood without any such modern - day concerns.
The most memorable one for me was when a new player tried to jump over a small gap and ended up falling into a pit full of slimes. The slimes started bouncing around him and he was desperately trying to get out while his character was making these really funny sounds. It was like a scene from a comedy.
Once upon a time, there was a little old lady who lived in a big, spooky house. Every night, she heard strange noises coming from the attic. One day, she finally mustered up the courage to go up there. She found a family of raccoons having a party. They were wearing tiny hats and dancing around. It was a dark and funny discovery.
One dark funny story is about a man who was so afraid of the dark that he always slept with all the lights on. One night, there was a power outage. He panicked and tried to find his way to the kitchen for a flashlight. He ended up bumping into every piece of furniture in the house. When he finally found the flashlight, he realized he had put it in his pocket before going to look for it.
They usually play on the flaws and absurdities of human nature. In a short story, a miser who is so stingy that he tries to bargain with the Grim Reaper to take someone else instead of him. The combination of the serious concept of death and the ridiculous behavior of the miser creates that dark humorous effect.
He could recommend some funny, relaxing, or dissing novels, such as Diablo's Destruction, Xyrin Empire, Red Blood Dragon Riders, Demon King's Divine Control, and Brave Beauty.