“Reversals can work physically or emotionally. They can reverse the action or reverse a character’s emotions. In Ghostbusters, our unemployed university professors reverse direction and start their own business. In Jaws, the townspeople think that they’ve caught the shark and start celebrating….The down and out psychic professors in Ghostbusters suddenly change from disappointment to excited. In Jaws, Martin and Matt move from celebration to fear.”
Linda Seger
Making a Good Script Great
page 77
Below is the scene in Jaws of the shark being cut open and the scene proceeding it where Matt (Richard Dyfuss) says that he’s leaving tomorrow to do shark research on a ship at sea for 18 months. After they cut the shark open he reverses his decision because (as he tells Sheriff Brody) “you’ve still got a hellofa fish out there.”