Half Move and Dodge at 1/3 HP: Realism of sudden drop?

[Flyndaran]

Originally Posted by Ulzgoroth

Crippled extremities trigger a knockdown check, don't they? Failing that and being physically stunned is somewhat incapacitating, and failing it hard leaves you unconscious.

That should probably be limb crippling, not any extremity.
There is no physical stunning. Stunning is a mental condition, unless you mean something like a stun gun physically stopping your muscles from working.