I just thought of some funny things that happened in daily life. For example, once I saw a dog wearing sunglasses and it looked so cool and funny at the same time.
It could be a story full of humorous dialogues. Picture this: a group of aliens land on Earth and try to communicate with humans using a translator that keeps malfunctioning, so they end up saying really absurd things like 'We come in peace, we want to borrow your toothbrushes'.
The person who wrote 'It's Kind of a Funny Story' is Ned Vizzini. His writing style and the way he developed the story made it a popular choice among readers.
The humor might come from the way the story is told. If it has a lot of vivid descriptions of funny expressions or sounds. Like in a story where a parrot imitates a person's sneeze in a very exaggerated way. It makes the story more engaging and funny.
The unexpected twists usually make it funny. For example, if a character is supposed to be very serious all the time but suddenly does something completely silly like dancing in the rain without any reason. That kind of deviation from the norm can be a great source of humor.
A story can be 'kind of funny' when there is an unexpected twist. For example, if you expect someone to be really good at something but they end up being completely hopeless at it. Like a professional athlete who can't ride a bike.