duck-and-cover

name	duck-and-cover
description	Drops quickly into a low crouch and covers the head with both arms to brace, via a sequence. Use when a command mentions duck and cover, brace for impact, shield your head, cover up and crouch, or protect your head and get down.
category	locomotion
disable-model-invocation	true
subskills	["bend-knees","move-arm","balance-and-posture"]

duck-and-cover

Drop into a tight low crouch (root.y~-0.4) and wrap both forearms over the head to shield it.

Composes: bend-knees + move-arm + balance-and-posture

How

• Use a sequence with loop:false. Crouch fast (knees ~90, torso forward) and bring the forearms over the head (arms up-and-in, Forearm curled), then hold.
• Keep the feet flat; do not travel.
• durationMs ~900.

Example

• "duck and cover" -> {"durationMs":900,"say":"Cover up!","sequence":{"loop":false,"frames":[{"t":0,"pose":{"LeftUpLeg":[0,0,180],"RightUpLeg":[0,0,180]},"root":{"y":0}},{"t":1,"pose":{"LeftUpLeg":[55,0,0],"LeftLeg":[90,0,0],"RightUpLeg":[55,0,0],"RightLeg":[90,0,0],"Spine":[25,0,0],"LeftUpperArm":[0,0,-130],"RightUpperArm":[0,0,130],"LeftForearm":[130,0,0],"RightForearm":[130,0,0]},"root":{"y":-0.4}}]}}

Limits & posture

Keep ≥1 foot grounded except at a jump's airborne apex; stay inside human joint ranges and keep weight over the support — see balance-and-posture.