When the dwarves delved too deep, they awoke something from the past....and thus the great dwarven city under the Misty Mountains was forever destroyed.
Thankfully I didn't push it that far with the marathon engine, but sometimes when the engines are pushed hard, nasty demons come out and bite your rump. I've had plenty of experience with that creating Phoenix Falling, and especially trying to debug my brother's maps (lol, he sent me some great maps, but after he sent them he told me that he never could actually play through so he never even saw parts of them, of course I didn't know this until I had restarted my machine a dozen times).
Oh, and Ernie, if you have a genuine love for playing marathon, creating a world through maps, shapes, and sounds, and story telling, then your scenario will rock! (and having an aesthetic eye and being a good writer also come in handy, maybe I should've paid more attention in english class ;)
-matt