Rather than edit my first post I'll write it here:

I've died twice, both as a result of a drug overdose, and been in two comas... well one coma, the other one I only suspect to be a coma as it only lasted about 2 hours.
Anyway, both times were fairly weird as I went from feeling the worst I've ever felt in my life, with the world fading away to darkness, to the best I've ever felt in my life. I got the mandatory tunnel of light, but no voices (which is a vicarious experience for a schizophrenic as I'm sure you can imagine), and then I became aware of a lack of something, like when you know you've forgotten something but you dont know what, and slowly everything faded away; the happy feeling, the warmth, my thoughts, they all went away and then there was darkness for an indeterminate amount of time.

When I woke up it was the most painful experince of my life, ever; my whole body was in pain, it was like I could feel every single nerve in my body. My eyes hurt, even in a darkened room, and for some odd reason I could sort-of feel my lungs...

Quite frankly comas are more fun.