Safety Not Guaranteed

This film follows a a group of interns and a writer who is following an ad that promises a time travel expiernce but doesn't promise that they will come back safely.  Once they meet the man who's responsible for the ad you start out thinking hes delusional but as the film goes on you start to realize that he may be telling the truth. I think the time machine was symbolizing the feeling that most people get to go back and fix there mistakes or to appreciate something that they took for granit.  I thought it was interesting how this film started out being realistic but then slowly became more outrageous as it went on.