Body Position positioning me to somewhere random?

I do not know the issue. But whenever the BP is used it just positions me to somewhere random? Its supposed to be a jump, and holds the player in air while a projectile fires. (A jump kind of effect into the air) I don't know the problem, but I have attached my script to this thread. Please help!

-- Variables
local UIS = game:GetService("UserInputService")
local Cam = script:WaitForChild("CamShake")
local ButtonEvent = script:WaitForChild("BtnDown")
local plr = game.Players.LocalPlayer
local Mouse = plr:GetMouse()
local Debounce = true
local BtnDown = false
Player = game.Players.LocalPlayer
Char = Player.Character

--- Functions:
local Tool = script.Parent

Tool.Equipped:Connect(function()
	Tool.Equip.Value = true
end)

Tool.Unequipped:Connect(function()
	Tool.Equip.Value = false
end)

--- Keybind
UIS.InputBegan:Connect(function(Input)
	if Input.KeyCode == Enum.KeyCode.Z and Debounce == true then
		Debounce = false --and Tool.Equip.Value == true and Tool.Active.Value == "None" then
		BtnDown = true
		--Tool.Active.Value = "WindSlam"
		
		local Charge = 0
		script.Function:FireServer(Mouse.Hit.p)
		
		local BG = Instance.new("BodyGyro")
		BG.Parent = Char.HumanoidRootPart
		BG.MaxTorque = Vector3.new(250000,250000,250000)
		BG.CFrame = CFrame.new(Char.HumanoidRootPart.Position, Mouse.Hit.p)
		BG.P = 25000
		BG.D = 140
		
		local BP = Instance.new("BodyPosition")
		BP.MaxForce = Vector3.new(math.huge,math.huge,math.huge)
		BP.P = 15000
		BP.D = 1250
		BP.Position = Char.HumanoidRootPart.Position
		BP.Parent = Char.HumanoidRootPart
		
		while BtnDown == true and Charge < 40 do
			BG.CFrame = CFrame.new(Char.HumanoidRootPart.Position, Mouse.Hit.p)
			Charge = Charge + 1
			wait()
		end
		BG:Destroy()
		BP:Destroy()
		ButtonEvent:FireServer()
	end
end)

UIS.InputBegan:Connect(function(Input)
	if Input.KeyCode == Enum.KeyCode.Z and Tool.Equip.Value == true and Tool.Active.Value == "None" then
		BtnDown = false
		Tool.Active.Value = "WindSlam"
		wait(1.5)
		
		Tool.Active.Value = "None"

		wait(3)
		Debounce = true
	end
end)

-- Camera Shake

function cameraShake()
	local Character = Player.Character
	local Humanoid = Character:WaitForChild("Humanoid")
	
	for i = 1, 40 do
		local a = math.random(-100, 100)/100
		local b = math.random(-50, 50)/100
		local c = math.random(-100, 100)/100
		
		Humanoid.CameraOffset = Vector3.new(a,b,c)
		wait()
	end
	Humanoid.CameraOffset = Vector3.new(0,0,0)	
end

Cam.OnClientEvent:Connect(function()
	cameraShake()
end)

u didnt rlly explain why u need to use this so i assume you would want to teleport a player somewhere so u can simply make a part where u want to teleport them make it invisible and and can collide of and use this (I EDITED THE ANS)

Char.HumanoidRootPart.CFrame = Char.Head.CFrame + Vector3.New(0, 5, 0)

this should teleport the player slightly above their head then u can anchor the player or whatever u want to keep it in air the unanchoore the player to get it back down