Plot hole: Why does the shark EXPLODE when it gets stabbed by the boat in the end? It had a transmitter of electromagnetic energy designed to shock it rammed down its throat, nothing that would explode like that.
Jaws 4 (1987)
1 plot hole - chronological order
Directed by: Joseph Sargent
Starring: Michael Caine, Mario Van Peebles, Lorraine Gary, Lance Guest
Factual error: At the end when the shark is attacking the boat and the electronic device is used you can hear the shark roar. Sharks cannot produce this sound since they have no vocal cords.
Michael Brody: Dad died of a heart attack!
Ellen Brody: No. He died from fear. Fear of that shark.
More trivia for Jaws 4
Question: Did this movie have any negative impact on director Joseph Sargent's life or career?
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Answer: Not really, he went on to direct many films and TV shows/miniseries, earning some Primetime Emmys and Director's Guild Awards in the process.