Scriptable Camera won't function right.. HELP?

So I'm working on making a cinematic and I'm just fooling around with the code and stuff, however I hit an early bump and I can't seem to figure out what's going on. If you scroll out, then hit F, it works like a charm. However, if you scroll all the way in, for some reason, the camera spazzes like crazy. My goal is to get it working in first person. Here's the code:

repeat wait() until game.Players.LocalPlayer.Character

--// Services
local rendered = game:GetService('RunService').RenderStepped
local uis = game:GetService('UserInputService')

--// Variables
local player = game.Players.LocalPlayer
local char = player.Character
local cam = workspace.CurrentCamera
local neck = char:WaitForChild('Torso'):WaitForChild('Neck')

local Active = false

local playerScripts = player:WaitForChild('PlayerScripts')
    local camControl = playerScripts:WaitForChild('CameraScript')
    local controlScript = playerScripts:WaitForChild('ControlScript')

--// Functions
function Start()
    char:WaitForChild('Humanoid').JumpPower = 0
    char:WaitForChild('Humanoid').WalkSpeed = 0
    Active = true
end

function End()
    char:WaitForChild('Humanoid').JumpPower = 50
    char:WaitForChild('Humanoid').WalkSpeed = 16
    Active = false
end

--// Connections
uis.InputBegan:connect(function(input,chat)
    if not chat then
        if input.KeyCode == Enum.KeyCode.F then
            Start()

        end
    end
end)

--// Renders
rendered:connect(function()
    if Active then
        cam.CameraType = Enum.CameraType.Scriptable
        cam.CFrame = char:WaitForChild('Head').CFrame + cam.CFrame.lookVector
        --neck.C1 = neck.C1:lerp(CFrame.Angles(0,85,0), 0.2)
    else
        cam.CameraType = Enum.CameraType.Custom
    end
end)

What is going on..?