 Why do Harvey and Joe change thier plan when confronting Johnson about the water?
Then Johnson rubbed his thumb on his index finger and wetted his lips expectantly. "Now do you see, my hot-tempered colleague?" said Harvey as he and Joe picked up buckets that hung on the tank. "Johnson, as I saw instantly, is the victim of a difficult environment, and must charge accordingly." "Just the same," Joe griped, "paying for water isn't something you can get used to in ten minutes." In the fragile forest, they soon came across a stream that sprang from the igneous soil and splashed into the small pond whose contents, according to the mayor, was theirs for the asking. They filled their buckets and hauled them to the ship, then returned for more.
 Joseph's son is large and intimidating, and they want to avoid a fight.
 Joe suddenly feels unwell, and Harvey needs to help him.  They want to buy Genius, and don't want there to be bad blood.  Joseph's son is large and intimidating, and they want to avoid a fight.  They don't think they could take Joseph in a fight.