Jack had an awful day fishing on the lake, sitting in the blazing sun all day without catching a single one. On his way home, he stopped at the supermarket and ordered four catfish. He told the fish salesman, "Pick four
large ones out and throw them at me, will you?"
"Why do you want me to throw them at you?"
"Because I want to tell Daniel that I caught them."
"Okay, but I suggest that you take the orange roughy."
"But why?"
"Because Daniel came in earlier today and said that if you came by, I should tell you to take orange roughy. He prefers that for supper tonight."
The fastest moon in our solar system circles Jupiter once every seven hours - traveling at 70,400 miles per hour.
You have to suspend disbelief a little bit to buy into your situation and to the story and to how the character will react. You have to tweak your credibility a little bit, is basically what it comes down to.
Richard Anderson