200 Items Or Less: The Incredible Shrinking Man (1957)
A few thoughts: 1957 was a pretty crazy year for horror (and sci-fi), varying from the birth of Hammer's gothic horror to the introduction of teen exploitation, as well as featuring several examples of corny alien invasions and giant monster pictures. A bit of everything, really. That being said, possibly the most interesting of all was this existential horror adventure. This is an impressive movie, from its scope to the execution of visually interesting and tricky effects. At its core, this is among the most terrifying movies of the 1950s, in spite of being pulled off in an adventurous way that is oddly misleading but ultimately effective. This is a very emotional movie that handles it's subject in a serious manner, never allowing itself to fall victim to its own inherent goofiness. Much like the greatest science fiction, this is a story that makes you think and sticks with you long after it's over. It makes household objects into the setting for an adventure and manages to be fun, haunting, and exhilarating at every turn.
Who would I recommend it to? Anyone who can appreciate '50s genre films should enjoy it.