Something really weird happened. A little insight please ?

[Nate]

Ok so here is what happened. It was a 6 years ago when my "dad" (not my real dad, but he kinda took me under his wing and we became really close) died. I was inconsolable for like a month afterwards. Probably another month or so after that I was sitting in a chair wondering what death would be like. I was focusing on in so hard that even with my eyes open everything went black. It seemed like only a minute or two went by and then the room came back into view. I looked up at the clock, and 3 HOURS had gone by. Ever since then I've been able to do the same thing with little effort. I know I'm not falling asleep because if my mind wanders at all I snap right out of it. I freaks my girlfriend and my family out pretty badly because I do it all the time and I guess I don't blink, you can't tell if I'm breathing or not, and I don't respond or even notice anythign happening around me. Now my question is... What the heck am I actually doing ? Is it meditation ? or something else ? any information would be helpful.... thanks