Oh wow, I get that semi-regularly (couple times a year maybe) when I'm sitting with in front of my HTPC TV with my wireless keyboard. Everything feels far away,

Oh wow, I get that semi-regularly (couple times a year maybe) when I'm sitting with in front of my HTPC TV with my wireless keyboard. Everything feels far away, and I feel tiny and dissociated from my actions. Not subtle at all. Standing up snaps me out of it, but it feels kind of cool so usually I let it persist. I don't think it's ever preceded any kind of headache, but I've never tried to correlate the timing with anything else. I'll have to pay more attention when it happens again.