I think that's one way of describing it.
Nightmares and dreams are manifestations of observed and imagined events, created by the mind, ostensibly for the purpose of understanding problems
and coming to realizations.
If you believe the world is Hell/Heaven in shades, as I do, then technically speaking, nightmares
are visions of Hell/Heaven (and so are our
waking perceptions).
From what I know about dreams, they don't keep time the way our waking experiences do. One second asleep can feel like hours, if your brain is
really humming.
So, in that last instant before death, when your brain basically pisses itself with adrenaline, there's a lot to be seen. What you see, and how it
affects you, would depend largely on the life you've led - or so I would imagine. Hence, concepts of Heaven and Hell may have some grounding in
reality, and could even be considered separately from notions of God and the Devil.
Honestly though, assuming for a moment that there is a God-created Hell, made to punish us in the afterlife (out of love, of course
), and also
assuming that nightmares are visions of that realm - I'm looking forward to it. My nightmares are nothing if not interesting.
Sure, they're scary sometimes, but so what? Small price to pay for entertainment that lasts an eternity, costs nothing, and offers more variety than
cable.