One of the funniest things is when you try to pet your animals, and they all start running around in a circle as if they're playing a game of chase. It's chaos but in a really cute and funny way.
Another aspect could be the relationship with her partner in the fanfic. If she's married in the game, her spouse would play a crucial role. They could be very protective, go with her to doctor appointments (if there were such a concept in the Stardew Valley world), and start planning for the new addition to the family, like building a new room for the baby.
The funniest thing could be when a dog gets loose in the supermarket and starts chasing after the meat department guy. It's chaos but also very funny to watch. The poor guy was running for his life while the dog was just having the time of its life.
Another funny incident can be when bank employees accidentally mix up the names of customers. I know a story where a Mr. Smith was called Mr. Johnson and vice versa for a whole day. They had to redo some transactions and apologize a lot, but in the end, everyone just had a good laugh about it. Mistakes like these can make for some really funny bank stories.
When people start playing games at a BBQ, like a water balloon fight. And then someone accidentally throws a water balloon at the grill, causing a big hiss and steam cloud. Everyone panics for a second thinking the grill is exploding, but it's just the water hitting the hot coals. Another funny thing is when a dog manages to steal a piece of meat from the grill and runs away with it, leaving everyone chasing after it.
A crish might try to imitate a much larger animal and end up looking really silly. For example, if a crish tries to roar like a lion, but all that comes out is a tiny squeak. It's like a little kid trying to be all tough.
A customer once mistook the relaxation music for a lullaby and started snoring really loudly during a facial. It was so embarrassing for the staff but also quite funny. The other customers couldn't help but chuckle.
In ophthalmology, sometimes patients bring in the most unusual eyewear for repair. I heard of a case where a patient brought in a pair of glasses that had been taped together with so much duct tape that it looked like a strange art project. The optician had a hard time not laughing while trying to figure out how to fix it.
Meeting really eccentric characters can be very funny on a trip. I remember meeting a man who was traveling with a pet parrot on his shoulder. He told us all kinds of wild stories. Also, transportation mix - ups are hilarious. Like when you think you're getting on a luxury train but it turns out to be a rickety old one with chickens on board.
When you go to a food truck at night and the vendor is doing some really wild food - making tricks. For example, I saw a guy making pizza dough and spinning it so high in the air that it almost landed on a customer's head. Everyone was both amazed and laughing at the same time.
One funny thing is when the TV in the hotel room has a mind of its own. I was trying to change the channel and it just kept switching back to a soap opera no matter what I did. Another is when you open the mini - bar and find the strangest items like pickled eggs or some really old - fashioned candies.