what are the most humorous situations in ch4 created by the narrator?

I think the main idea in this chapter is their entertaining misadventure of using a paraffin oil stove on a previous misadventure:

We had taken up an oil-stove once, but "never again." It had been like living in an oil-shop that week. It oozed. I never saw such a thing as paraffine oil is to ooze. We kept it in the nose of the boat, and, from there, it oozed down to the rudder, impregnating the whole boat and everything in it on its way, and it oozed over the river, and saturated the scenery and spoilt the atmosphere. Sometimes a westerly oily wind blew, and at other times an easterly oily wind, and sometimes it blew a northerly oily wind, and maybe a southerly oily wind; but whether it came from the Arctic snows, or was raised in the waste of the desert sands, it came alike to us laden with the fragrance of paraffine oil.