Can someone tell me where I'm wrong?

Okay so I want to do a damage script with a NumberValue but for some reason it kills the dummy I'm testing the move on,can someone tell me where I did wrong? Here's the script

wait(3)
local debounce =  false
Player = script.Parent.Parent.Parent
n = script.Parent
mouse = Player:GetMouse()
run = game:GetService("RunService")
duh = 0

function pizza(mouse)
	if debounce == false then
		debounce = true
			local x = Instance.new("Part")
			x.Shape = "Ball"
			x.Anchored = true
			x.CanCollide = false
			x.Reflectance = 0
			x.Transparency = 1
			x.TopSurface = "Smooth"
			x.BottomSurface = "Smooth"
			x.Parent = Workspace
			x.Size = Vector3.new(270.05, 70.48, 289.81)
			x.BrickColor = BrickColor.new("White")
			x.Name = Player.Name
			x.Parent = Workspace
			x.CFrame = Player.Character.Torso.CFrame *CFrame.new(0, -3, 0)
			local x1 = Instance.new("Part")
			x1.Shape = "Ball"
			x1.Anchored = true
			x1.CanCollide = false
			x1.Reflectance = 0.1
			x1.Transparency = 0.8
			x1.TopSurface = "Smooth"
			x1.BottomSurface = "Smooth"
			x1.Parent = Workspace
			x1.Size = Vector3.new(150, 150, 150)
			x1.BrickColor = BrickColor.new("White")
			x1.Name = Player.Name
			x1.Parent = Workspace
			x1.CFrame = Player.Character.Torso.CFrame *CFrame.new(0, -3, 0)
			m = Instance.new("SpecialMesh", x1)
			m.MeshType = "Sphere"
			m.Scale = Vector3.new(2, 1, 2)
				x.Touched:connect(function(Part) 
    if Part.Parent:FindFirstChild("Humanoid") ~= nil and Part.Parent:FindFirstChild("Humanoid") ~= Player.Character.Humanoid then
	for i, v in pairs(Part.Parent:GetChildren()) do
		if v:IsA("NumberValue") and v.Name == "damage" then return 
			else
				damage = Instance.new("NumberValue", Part.Parent)
				damage.Value = 30
					Part.Parent.Humanoid.Health = Part.Parent.Humanoid.Health -damage.Value
				Part.Parent.Humanoid.Sit = true
				wait(0.1)
				Part.Parent.Torso.Velocity = Vector3.new(math.random(-500,500),650,math.random(-500,500))
			end
		end
	end
	wait(0.025)
end)
			game.Debris:AddItem(x, 5)
			game.Debris:AddItem(x1, 5)
	
	wait(60)
	debounce = false
	end
end


function onSelected(mouse)
	mouse.Button1Down:connect(function() pizza(mouse) end)
end

n.Selected:connect(onSelected)

When the projectile hits someone, what the script understands is that the projectile is actually hitting that guy a million times. Try adding a BoolValue object to the projectile that becomes true when the projectile is touched. Then, add to line 44, checking to see if that BoolValue is false.