Gladiator Like Proximo (although he wasn’t real), gladiators were gifted a wooden sword called a “rudis” which symbolized their freedom from the gladiator life, if they so chose.
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The Mummy The wraps used in Imhotep's mummification were accurate and there were ancient culutures that mummified the living, although Egyptians weren't known for it.
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The Dark Knight Batman is extracted from Hong Kong using the actual methods of the CIA and a device called a Sky Hook, as mentioned by Morgan Freeman’s character (although the program actually started in the 50s, instead of the 60s as the movie says).
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Jaws The crew of the USS Indianapolis really did get eaten by sharks after delivering an atomic bomb.
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Indiana Jones and the Temple of Doom Dr. Jones returns, and this time it was with a human-sacrificing called called the “Thuggees”, which was a real Indian criminal fraternity from the 19th century.
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Indiana Jones and the Kingdom of the Crystal Skull More than a dozen crystal skulls have been found and displayed in museums around the world, but they can all be traced back to an archaeologist/fraudster named Eugene Boban who created them in the late 1800s.
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Jurassic Park Dinosaurs were more closely related to birds than reptiles and that's a fun thought to keep in mind. We're still in the age of the dinosaurs.
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X-Men: Days of Future Past Richard Nixon’s tapes did feature mysteriously missing minutes. Probably not about mutants, but we really can’t be sure, can we?