People have always been amused by anything that is not real because fantasy offers a welcome escape into a world where the real problems and reality do not exist. It gives them something to think about when times are tough and they could do with some entertainment.
And one of the genres of movies that have been entertaining people for the past few decades is the genre of Sci-fi or scientific fiction.
One of the best and the highest grossing movies in this genre have been Star Wars that offered people a look into an alternate universe of beings with extraordinary powers.
Then ofcourse comes, E.T : The extraterrestrial, a movie about an alien who is left stranded on earth and is saved by a little boy not just from the people around but also from the government who would love to put it under the knife, for scientific experimentation.