The Serpent And The Rainbow (1991)

Rating: ***
Director: Wes Craven
Cast: Bill Pullman

Here's a disturbing film about a guy (Bill Pullman) who goes to Haiti looking for a miracle drug that raises people from the dead. Instead, he gets messed up by the local voodoo culture. Pretty creepy stuff with several "oh my god is it alright to look now" moments that'll probably give you bad dreams.