The walk animation is just one, "walk", with both feet at the same time, and you can't simply play one on a different part of the body - the "recoil" in left hand (Dual Guns / Badspot's Guns Akimbo) is simply the Shift Up which moves both but left hand more, while the right hand is your "Shift Away" animation which has your right hand only. The "slot" variable in the playThread function (playThread(0,shiftAway) etc) is just for playing two at once without inteference, otherwise your feet would stop if you are running and then fired a gun, not "body part it is on" such as the gun mountpoint.