Factual error: Though extremely modest on today's standards, the dress worn by Clara to the hoedown shows far too much cleavage for the time. No schoolteacher would ever wear a dress like that in the 1880s.

Back to the Future Part III (1990)
Plot summary
Directed by: Robert Zemeckis
Starring: Christopher Lloyd, Elizabeth Shue, Lea Thompson, Mary Steenburgen, Michael J. Fox, Thomas F. Wilson
Though Doc asked Marty not to come back for him, Marty does go back anyway, because he and the 1955-Doc find out that Emmet Brown was killed shortly after the writing of the letter (by Mad Dog Tannen, the great-grandfather of Biff).
Right after the time-jump, the DeLorean is attacked by Indians who put an arrow to the gas tank, the fuel goes away.
Doc finds a way to solve that: they must kidnap a train and accelerate with that above 88 mphs.
Doc saves the new teacher of the town, Clara Clayton, who was supposed to die, and falls in love with her.
Trivia: The band playing at the Hill Valley festival is rock band ZZ Top (two guys with long white beards playing guitar, and a drummer), who wrote songs for the film.
Question: Is "Googolplex" an actual word?
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Chosen answer: Yes. A "googol" is the number 10 raised to the 100th power, or a 1 followed by 100 zeroes. A "googolplex" is an even larger number - 10 raised to the power of a "googol", or represented as 1 followed by a "googol" zeroes.
BGraz