I think at first they mightve yelled at one another a couple times, and It was just a part of the pressure getting the bike done. And then those tv executive suits we're telling them that people were watching the show because they yelled at each other all the time, and then from there it became a circus act the way they went back and forth for no reason. Some episodes were like 5 minutes of bike building and the rest just arguing about paully acting lik a spoiled "bosses kid"