People assume that time is a strict progression of cause to effect, but actually, from a non-linear, non-subjective viewpoint, it's more like a big ball of wibbly-wobbly, timey-wimey stuff.
That is rather unfair of you pedro. Perhaps if you happen by this sometime you could give a real response? Perhaps admonishing him for rudeness? Or maybe just mentioning that it was a quote from Dr. Who and is to be taken as humor?
The theory of relativity has now been simplified for half-wits, the people who have no use for it in the first place. Perhaps they should concern themselves with subjects more appropriate to their intellects. For instance: basic addition, or shoe-polishing.