Symptoms VII ~ Blanking Out

I realise that I spend a lot of my time on the 'net, and that it tends to suck time away, but I've noticed a lot more lately that time seems to just slip past me in blocks. I can sit down on the sofa and look up and find an hour has passed without me noticing. I just kind of phase out and forget that I am there. Or that the room is there. It's not like time is standing still, but more like I am and time is rushing past me faster than usual.