Your voice will not rise in pitch, as it does under stress. The way you breathe will change. After twenty-seven sessions you have finally slain the Three Giant Dragons of Chaos. You'll never be over-encumbered. Magically, the smoke heals you.
Characters never die.
No matter what. Your limbs fall off. That should last the first session. Will emotionally scar any player under the age of sixteen. Knows no shame.