TimeSplitters: Future Perfect Hints

In the 2nd level (scotland the brave i think) there will be telescope room where you can look at other rooms (considering you havent blown up the cameras that is) in the 2nd telescope room there will be some stairs reach the top of the stairs and look outside with a sniper rifle look towards the way you came from and you should see yourself walking towards the castle, try to shoot yourself in a time paradox :)