4. It Makes No Sense!
There are not many time travel films that don't leave the viewer scratching their heads a little as they attempt to understand just how exactly the events that have just witnessed could have occurred. With so many potentially terrible consequences of changing the course of history it would surely become staggeringly hard to keep track of the whole thing and that is assuming that everything on your time travelling adventure made sense. But the problem is that apparently nothing makes sense in a world with time travel much like in Looper, which is an entertaining romp, but it does very well highlight just how damn confusing the whole time travel thing is when you really start thinking about it. The majority of people I know that really enjoyed it are the one's who simply didn't think about the time travel elements, the people who had issues with it were the one's who sat in darkened rooms drawing diagrams of timelines. If the tube map manages to confuse people then time travel is just not going to work out.