Sorry for the double post, but I remember reading up on something called "Astral projection"
It is basically having an out of body experience...
However... There are such things as Astral Planes. We are in the third Astral Plane (sound familiar?) All objects in our realm can be interacted with...
One step above is our physical world, with more to it. Random things floating about... However, we cannot see them in OUR realm, but in this realm, we can be seen. Basically, it's like a one way mirror, and we have the mirror side. We can't see through it, but what/whoever is in the fourth realm can see us.
When you Astral Project, you enter the fourth plane, but there are ways to enter the higher and lower ones.
Apparently, there are several planes, and the higher you go, the better it gets, with the last being basically, our version of heaven.
Ironically, there are only 2 levels below us, with the 1st being hell. Isn't that nice?
The only reason I can believe all this is because people can Astral Project. In fact, when you dream, you are astral projecting. However, when people Astral Project, they often don't realize it. You can train yourself to Astral Project and visit all these realms, but it takes years of meditation.
I suggest looking it up. There are websites meant for explaining things better than a 14 year old can.