The reality programme makers shoot vast amounts, then edit it to get the effect they want. They keep in controversial and extreme remarks, even if they are throwaway asides, and discard all the ordinary exchanges. I know someone who was on "Come Dine With Me" - everything was filmed again and again until the early hours, when they were all so tired they didn't know what they were saying and the food was cold and unappetising. He over-reacted a bit explosively to some horrible plonk (probably sneaked in by the production team) - guess which shot was shown again and again at the start of each episode?