Well first off there are various definitions floating around out there as to what exactly constitutes sub-space.

In older traditions its usually defined as a form of cognitive disassociation that's only brought on by an overwhelming rush of endorphins in combination with very hard and serious real life pain play or repetitive forced orgasms during certain types of muscle tension inducing bondage conditions in which a submissive will tolerate or even appear to enjoy or become completely incoherent from levels of pain that can actually be harmful if taken too far.

In other peoples books its a floaty submissive feeling with little physical ramifications other than some lingering feelings later of perhaps feeling down and appears to be a completely mental phenomena that a little time and re hydration of electrolytes can fix with no problems.

I think the kind of sub-space your referring too and the kind very few people experience in real life are two very different animals and that your not really in all that much danger sitting in front of a computer screen by comparison to the other IMHO.

Here are some links to previous threads where we discussed sub-space for those who are interested:

http://www.bdsmlibrary.com/forums/sh...ighlight=space

http://www.bdsmlibrary.com/forums/sh...light=subspace

http://www.bdsmlibrary.com/forums/sh...ight=cognitive