How offten are you killing your players is the question? there are countless ways to whoop-on players, make the combat dangerous and gritty without killing them every other game. Siimply saying "Wow, ouch, yes..the Troll hit you, now your unconcsious so you can't see what happens." turning to the other players the Dm Says, "you see his body hit square in the chest, doubled over, then grabbed by the back of his shoulder and thrown out the cave, his shins snapping on the rocks before he vanishes." Now, when the combat is over, the players find out that the knockedout guy, is seriously wounded, and will take along time to heal natrually without magical or medical aide. This way, the knocked out player didn't get the Xp, or the gold, but didn't die, and ended upw ith alot of wounds that will cost him to fix. He'll be smarter for it next time.