When i go "left" and my camera is looking forward the uppertorso is rotating left?

Does anyone know whats wrong in these scripts? When my character is looking "left" and i'm looking forward the upper torso is rotating left and the same happends when i go "right"

btw its for some kind of dynamic rotation like on the game Jail break.

--local script

repeat wait() until game.Workspace.CurrentCamera ~= nil

local player = game.Players.LocalPlayer;
local runService = game:GetService("RunService").Heartbeat;
--local playerMouse = player:GetMouse();
local playerMouse = game.Workspace.CurrentCamera;
local remote = script.Parent:WaitForChild("Remote");
local character = player.Character;
local humanoid = character:FindFirstChild("Humanoid");
local head = character:FindFirstChild("Head");
local lowertorso = character:FindFirstChild("UpperTorso");
local neck = head ~= nil and head:FindFirstChild("Neck") or nil;
local waist = lowertorso ~= nil and lowertorso:FindFirstChild("Waist") or nil;

local lastMousePosition = playerMouse.CFrame.lookVector;
runService:connect(function()
    if head ~= nil then
        if neck ~= nil and lastMousePosition ~= playerMouse.CFrame.lookVector then
            remote:FireServer(playerMouse.CFrame.lookVector,waist,character);
            lastMousePosition = playerMouse.CFrame.lookVector;
        else
            neck = head ~= nil and head:FindFirstChild("Neck") or nil;
        end
    else
        head = character:FindFirstChild("Head");
    end
end)

-script

local remote = Instance.new("RemoteEvent", script);
remote.Name = "Remote";

remote.OnServerEvent:connect(function(player, mouseDirection, waist,char)
    waist.C1 =  CFrame.new(Vector3.new(0, -.4, 0)) * CFrame.Angles(-math.asin(mouseDirection.Y),-math.asin(mouseDirection.X),0)
end)