Midnight in Paris was the most enjoyable movie I saw in the summer of 2011. A disaffected writer visiting Paris experiences something surreal during a midnight stroll that changes his outlook on life. The movie is funny, smart and full of subtle insights about life, the universe and everything. I can’t say any more without giving away the best parts.
The trailer is careful not reveal any of the key elements of the movie. The linked review is one of the few I’ve found online that discusses the relevant qualities of the movie without giving anything away.