Being John Malkovich is a fantastic movie that combines good humour with a good story. It's almost an adventure, with many supernatural elements being mixed with the normal reality we live with every day.
It tells the story of how a confused, and troubled puppeteer discovers a portal into John Malkovich's brain, allowing people to stay inside his head, and see what he sees, for 15 minutes at a time, after which they're dropped from the sky in a ditch outside the city. Soon though, they discover that people can do more than just see what he sees, they can control his emotions, actions and thoughts, and it soon goes too far.
Lots of good acting, combined with a very good sense of humour and a great story that makes you smile makes this movie a must-see!