Jaws

25: On a pier, two fishermen throw meat into the water. Cut to Martin examining photos of sharks and people attacked by sharks; he begins to understand the size and impact of sharks on people. Cut to pier, the meat is taken and the pier collapses, the fisherman falls in and is nearly eaten. The birth of something new.

45: Hooper tells Martin the shark is a rogue and is establishing his territory. Hooper tells Martin he's going to look for the shark. Martin goes with him. Both understand more about the nature of the shark. Now that I'm aware.

60: Tourists leave the water in a panic. The mayor looks depressed, his efforts to keep a lid on the presence of a killer shark have failed. He understands people are going to leave and take their money elsewhere. There's no going back now.

-45: Quint reels in the shark and tells us the shark is very smart and very big. Quint argues with Hooper. Minutes later Martin tells Quint "You're going to need a bigger boat." Discovery.

-25: A yellow barrel emerges from the water. The boat isn't moving. The shark emerges and takes the rope, causing hands to bleed. Martin starts to radio for help but Quint takes a bat and destroys the radio. Quint later dies. The final turning point.