Character Tilting works wierd when it playing animation

Help and Feedback Scripting Support
, ,
#1

As you can see in this video, my character tilting doesn’t work properly:

and my character tilting script is here

local neckC0 = CFrame.new(0, 1.173, -0.009, 1, 0, 0, 0, 1, 0, 0, 0, 1);
local waistC0 = CFrame.new(0, 0.109, -0.009, 1, 0, 0, 0, 1, 0, 0, 0, 1);
local lShoulderC0 = CFrame.new(-0.812, 0.69, -0.009, 1, 0, 0, 0, 1, 0, 0, 0, 1);
local rShoulderC0 = CFrame.new(0.812, 0.69, -0.009, 1, 0, 0, 0, 1, 0, 0, 0, 1);
local ToolOffset = CFrame.new(0, 0.634, 0);

function Tilt(character: Model, theta: number)
	if not character then
		return
	end
	if not (character:FindFirstChildOfClass("Humanoid") and character.Humanoid.Health > 0 and character:FindFirstChild("Head")) then
		return
	end
	
	local neck = character.Head.Neck
	local waist = character.UpperTorso.Waist
	local rShoulder = character.RightUpperArm.RightShoulder
	local lShoulder = character.LeftUpperArm.LeftShoulder

	task.synchronize()

	neck.C0 = neckC0 * CFrame.fromEulerAnglesYXZ(theta*.75, 0, 0);
	waist.C0 = waistC0 * CFrame.fromEulerAnglesYXZ(theta*0.25, 0, 0);
	rShoulder.C0 = rShoulderC0 * CFrame.fromEulerAnglesYXZ(theta*0.75, 0, 0);
	lShoulder.C0 = lShoulderC0 * CFrame.fromEulerAnglesYXZ(theta*0.75, 0, 0);
end	

return Tilt

(each client fires the remoteEvent to server)

I think the torso rotated in the gun animation caused this problem
Help me!