Pillar changing position to above what its touching, any ideas on how to fix?

I have been posting a lot about this script lately, And I'm finishing it off by fixing one last bug. Basically when I cast it, if someone walks into it, it automatically puts itself on their head, is there a way to fix this? My code:

--made by commag


local ChatService = game:GetService("Chat")

local Plr = game.Players.LocalPlayer
local Char = Plr.Character
local TS = game:GetService("TweenService")
repeat wait() until Char
local PG = Plr.PlayerGui
local G = Instance.new("ScreenGui", PG)
local MF = Instance.new("Frame", G)
MF.Size = UDim2.new(0.2,0,0.2,0)
MF.Style = "DropShadow"
MF.Position = UDim2.new(0.8,0,0.8,0)
local EVal = Instance.new("StringValue", PG)
EVal.Value = "Unequipped"
local T = Instance.new("TextButton", MF)
T.BackgroundTransparency = 1
T.Size = UDim2.new(1,0,1,0)
T.Text = "Death Pillar: " .. EVal.Value
T.TextScaled = true
local M = Plr:GetMouse()
local Casting = false



----------

M.Button1Down:connect(function()

    if Casting == false and EVal.Value == "Equipped" then
    Casting = true

        ChatService:Chat(Char, "I will cleanse this world...", "Green")
        wait(2)
        ChatService:Chat(Char, "With The Pillar Of Death!", "Green")


        local Pillar = Instance.new("Part")
        Pillar.Shape = "Cylinder"
        Pillar.Size = Vector3.new(500,0.1,0.1)
        Pillar.CFrame = CFrame.new(M.Hit.p - Vector3.new(0,M.Hit.y + 100,0)) * CFrame.Angles(0,0,math.rad(-90))
        Pillar.TopSurface = "Smooth"
        Pillar.BottomSurface = "Smooth"
        Pillar.BrickColor = BrickColor.new("Really black")
        Pillar.Transparency = 0.4
        Pillar.Material = "Neon"
        Pillar.Anchored = true
        Pillar.CanCollide = false
        wait()
        Pillar.Parent = game.Workspace


        local TIO = TweenInfo.new(
            3,
            Enum.EasingStyle.Linear,
            Enum.EasingDirection.Out,
            1,
            true,
            2
        )

        local Prop = {
            Size = Vector3.new(500,50,50)
        }

        Pillar.Touched:connect(function(H)
            if game.Players:GetPlayerFromCharacter(H.Parent) and H.Parent.Name ~= Plr.Name then
            H.Parent:BreakJoints()

            end

        end)

        local Tween = TS:Create(Pillar, TIO, Prop)
        Tween:Play()
        Tween.Completed:connect(function()
        Pillar:Destroy()
        end)

        wait(10)

    Casting = false


    end 
end)

T.MouseButton1Click:connect(function()
    if EVal.Value == "Unequipped" and Casting == false then
        EVal.Value = "Equipped"
        elseif EVal.Value == "Equipped" and Casting == false then 
        EVal.Value = "Unequipped"
    end
end)

while wait() do
    T.Text = "Death Pillar: " .. EVal.Value
end