Well, i don't really know dude. This guy seems more sane to me than the numerous "professional" nutjobs in here.
If we had more people like him, there would be much less wars imo.
And very little of anything else.
Look: Catchphrases like "5th dimenion", "going into a dimension" and so on will catch the imagination of people who don't really know what "dimension" means in the hard sciences. That's a very rigorous, and precise concept, not a word thrown about to describe something unkown. To anybody who knows what "dimension" means to scientists, things like "entering another dimension" and so on will sound like balderdash, codswallop.
To give an informal and unrigorous explanation, "dimension" is the number of co-ordinates required to locate or specify a point in a particular space. So on a piece of paper, you need two co-ordinates to locate a point. In space, or in the 3 dimensional space, you need three co-ordinates to say where something is. (Like an aeroplane in the air - you have to specify the latitude, longitude and elevation to say precisely where it is.) Now if you want to take the space-time continuum, you would need four co-ordinates ("numbers", to make it simpler) to locate a point at a certain time.
Mathematicians and physicists often "work" with higher dimensions. That means, they try to figure out physical laws with the three space co-ordinates, plus a time co-ordinate, plus other co-ordinates. Then their equations would need more than four "numbers" to locate any particular point.
That's what "dimension" means. How many numbers are required to locate one point. Somebody "moving into another dimension" sounds profound to people who dont have a clue what dimension means. But to those who do, it is mere mumbo-jumbo.