@Iskios Well, it's an interesting question since we don't actually see "3D" we infer it from parallax from 2 2D images and a bunch of brain heuristics about shadows and the relative sizes of objects :)
@sfleetucker The issue is that the same is true of the movie. If you see it in 3D it is because the glasses are giving you the paralax you need to interpret it as such. The difference you mention is simply pedantic.
@Iskios It is indeed. :)
@sfleetucker It is a cliff whose edges I fall off often.
@Iskios I like to think of it as base jumping!