butt-kick-run

name	butt-kick-run
description	Runs forward kicking the heels up to the glutes (butt kicks) via a translating sequence. Use when a command mentions butt kick run, heel flicks while moving, kick your heels up running, or traveling butt kicks. (For butt kicks in place, use butt-kicks.)
category	locomotion
disable-model-invocation	true
subskills	["move-leg","move-arm"]

butt-kick-run

A traveling butt-kick drill: snap each heel up to the seat while moving forward.

Composes: move-leg + move-arm

How

• Use a sequence with loop:false. Frame root is ABSOLUTE; compute the travel axis from state.position+state.faceDeg (0=+Z, 90=+X). The example assumes origin facing +Z.
• Alternate a fully flexed knee (Leg~130) with the thigh near neutral; arms pumping.
• durationMs ~2200.

Example

• "butt kick run" -> {"durationMs":2200,"say":"Heels to the seat!","sequence":{"loop":false,"frames":[{"t":0,"pose":{"LeftLeg":[130,0,0],"RightForearm":[0,0,90],"LeftForearm":[0,0,-90]},"root":{"z":0.6}},{"t":0.5,"pose":{"LeftLeg":[0,0,0],"RightLeg":[130,0,0]},"root":{"z":1.2}},{"t":1,"pose":{"RightLeg":[0,0,0]},"root":{"z":1.8}}]}}

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.