One of the best wtf stories I've heard was about a man who found a penguin wandering in his backyard. He lived miles away from the ocean. It turned out the penguin had escaped from a traveling zoo. Another one is when a woman opened her mailbox and found a live chicken inside. No one knew how it got there.
One wtf scary story could be about a haunted doll. There was this old doll found in an attic. It had a cracked porcelain face and seemed to move on its own at night. People would hear strange giggling coming from the room where it was placed. Another could be a story of a cursed mirror. Those who looked into it saw disturbing visions of their own deaths. And then there's the story of the abandoned asylum where patients' screams still echo through the halls, as if their tortured souls are still trapped there.
There's this story about a guy who accidentally put salt instead of sugar in his coffee while half - asleep. He took a big sip and his face was priceless. He spat it out all over the table and then had to clean up the mess while still in a daze. It was so funny.
The most interesting best wtf story might be the time when a cat somehow managed to get stuck inside a vending machine. People were trying to get their snacks and suddenly they saw this cat looking at them through the glass. Another is a story where a town had a sudden rain of fish. Scientists still can't fully explain how that happened.
One wtf school story I heard was about a teacher who accidentally set off the fire alarm while demonstrating a science experiment. The whole school had to evacuate and it turned out to be a huge mess.
They're popular because they give people a thrill. It's like a safe way to experience fear. We can sit in the comfort of our homes and still get that adrenaline rush.