I do think the end scene of Jaws: The Revenge, where the shark explodes for no real good reason is a pretty good example of something to make you say "What???"
I need to see the 'reimagined' JAWS: THE REVENGE. When I saw it at the theater way back when, the shark got speared by the boat, hollered, and just sorta hung there and wiggled.
Having the shark blow up real good for no apparent reason sounds like an improvement!