Prone (Condition)

Being on the ground is called being Prone, and this Condition covers crawling,
sitting, and any other form of limited movement. A character's effective Speed
scores (and height) is quartered while Prone.

The Prone Condition counts as a Fact for any Save where it's relevant — prone
characters have a hard time defending against melee strikes, but an easier time
against long-distance ranged attacks.

The Prone Condition is countered by taking the Stand Up Action.