if ((animationState player) in ["smk_urbanproneright","smk_prone_to_urbanprone_right","smk_urbanproneleft","smk_prone_to_urbanprone_left"]) then {
    player switchMove "";
    player playActionNow "stop";
};

//Just put that in your dayz_spaceinterupt.sqf below the first instance of _handled = false;