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.
The funniest thing that can happen during a trip is when nature plays tricks on you. I was camping once and set up my tent near a tree. In the middle of the night, a squirrel dropped a nut on my tent, which made a loud noise and scared me half to death. But looking back, it was really funny.
Funny things during camping often involve camping gear. For example, my family had a tent that was supposed to be waterproof. But during a rainstorm, it started leaking like a sieve. We all huddled in the dryest corner and told jokes to pass the time. Also, when trying to start a campfire, sometimes the smoke blows right into someone's face, making them cough and look like a chimney. It's always good for a laugh.
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.
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.
One funny thing is when a customer falls asleep while getting their hair dyed. They wake up with a strange color on part of their hair because they moved in their sleep. For example, a guy once woke up with bright pink patches on his head instead of the planned blonde.
In a marriage, sometimes the way a couple argues can be funny. For example, my neighbor couple once had an argument about what to have for dinner. They started making really exaggerated points about pizza vs. burgers, and they ended up making each other laugh instead of being angry.
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.
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.
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 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.