Which excerpt from the adventures of huckleberry finn contains humor? well, that night we had our show; but there warn't only about twelve people there—just enough to pay expenses. and they laughed all the time, and that made the duke mad; and everybody left, anyway, before the show was over, but one boy which was asleep. so next morning he got some big sheets of wrapping paper and some black paint, and drawed off some handbills, and stuck them up all over the village. the third night the house was crammed again—and they warn't new-comers this time, but people that was at the show the other two nights.

And they laughed all the time, and that made the duke mad; and everybody left, anyway, before the show was over, but one boy which was asleep.

Explanation:

Mark Twain's "The Adventures of Huckleberry Finn" tells the story and adventures of a young boy 'Huck' and his life looking for adventures.

The above provided excerpt is from chapter XXII of the book where Huck had watched a circus show. Then, the duke's performance was viewed by only twelve people, not enough to get any profit. The lines "And they laughed all the time, and that made the duke mad; and everybody left, anyway, before the show was over, but one boy which was asleep" shows the humorous occasion in the context. The performance of the duke may have attracted just a meager number of audience but those viewing it still had a lot of fun and laughed, which made the duke met. But this was all supposed to be, for he's performing and it is on the audience how they react. The anger of the Duke made everyone leave before the show was even over, except one boy who couldn't leave for he had already fallen asleep to even leave.  

i love cake

and don't hate

i know i'm fat

but what's wrong with that

i cant rap

but im sure ya know that

its just for fun

so quit hatin' son

~courtney