I had one of the more interesting situations behind the screen today. It seemed that I had good die rolls when my random encounters and grunts were attacking my players, but my big creatures couldn't hit the broad side of a barn. As an example, my fleshcrawler attacked with three tendrils, all missed.
Then the sucker got turned and then munched. Oh well, I guess I'll have better luck with the big boss in the dungeon.

