Downed is a state in which a pawn is rendered incapable of movement, and becomes a valid target for a variety of actions including, but not limited to, rescue, imprisonment, stripping of apparel including utility items, and involuntary loading into a cryptosleep casket. When pawns are downed, they drop any weapon in their hands.
Downing happens when a pawn's Moving capacity is reduced below 15%. This can occur through a variety of methods - a pawn may simply have their Moving capacity directly reduced such as by the destruction of their legs, alternatively a pawn lose sufficient Consciousness which in turns affects Moving.