The funniest parts usually involve the ticklish girl's attempts to bargain or make deals to stop the tickling. She might say things like 'I'll do your chores for a week if you stop!' while still laughing and squirming. And when the tickler pretends to stop and then suddenly starts again, the tickled girl's shocked and then laughing reaction is quite amusing.
Well, it can be really funny when the tickling leads to an unexpected reaction. For example, the tickled girl might accidentally bump into something while trying to get away from the tickling. Or she might start making really strange noises while laughing. Also, when the girls start tickling each other in a chain reaction, like one tickles another and then that one tickles someone else, it creates a really chaotic and funny situation.
In an animation tickle story, the moment when the normally serious character gets tickled and breaks into uncontrollable laughter is really funny. For example, if a strict king in an animated world is tickled by a little joker character. His pompous expression changes to one of pure mirth.
The funny part can also be the misunderstandings during the DWI stop. One time, a driver thought the officer was asking him about his pet's name instead of his own name for the initial check. So he kept saying his dog's name over and over. The officer was really confused at first and then couldn't stop laughing when he realized what was going on. And of course, the whole situation just gets funnier as the driver tries to correct himself while still being a bit tipsy.
Another funny part is when the Vanara army was getting ready for battle. They were all trying on different armors and weapons. There was one Vanara who put on a helmet that was way too big for him. It covered his whole body and he couldn't see where he was going. He started walking in circles and bumping into other Vanaras, causing a lot of chaos and laughter among the troops.
The funniest part in a goofy Christmas story could be when the characters misunderstand the whole concept of Christmas. For example, if a group of elves thought that Christmas was about eating as many cookies as possible instead of making them for Santa. Their little bellies would be so full and they'd waddle around trying to do their jobs, which is really hilarious.
The funniest part is when Goldilocks tries the chairs. The big chair is too hard, so she makes a funny face. Then she tries the medium chair and it's too soft, and she almost sinks into it. Finally, the small chair is just right but breaks under her. Another funny bit is when she wakes up and sees the bears, her expression must be priceless as she runs away in a hurry.
The funniest part could be the initial reaction of the girl when she is suddenly tickled. For example, if she jumps or makes a really surprised face, it adds a lot of humor.
The funniest part could be the unexpectedness of the tickle. For example, when a school girl is focused on something like reading a book or doing her homework and suddenly her friends start tickling her. Her initial shock and then uncontrollable laughter can be really hilarious.
I think the unexpected alliances and betrayals are interesting. In a tickle war, you might start out with one group of people, but then someone switches sides to avoid being tickled or to get back at someone. Also, the different tickling techniques people use can be really funny, like trying to reach that one spot that makes someone really squirm.
The funniest parts often revolve around the unexpected consequences of its high speed. For instance, the fact that the SR - 71 could cover vast distances in a short time meant that pilots sometimes had to readjust their mental maps quickly. Also, the way the plane interacted with the air at those speeds. It was like it was dancing through the atmosphere, and any miscalculation could lead to some humorous (but also dangerous) situations. And let's not forget the look on the faces of other pilots when they saw the SR - 71 streak by them at lightning - speed.
A friend told me that her mom would tickle her every time she tried to be lazy on Sunday mornings. Her mom would sneak into her room and tickle her toes until she got out of bed, laughing all the way. It was a funny and effective way to start the day.