While I was looking at examples of storyboards I came across a cartoon called Timmy's lesson's in nature. each episodes are roughly one minute, so I thought watching them would give an idea of how to make something funny within one minute. And it sort of helped, first they introduce the character and the location they are in, then the object which is an animal. Finally what did he do to the animal and what was the cause of his action. And it ends with a message saying what to/not to do when seeing the animal.
Here is a link to three episodes of Timmy's lesson's in nature.
copy and paste.