How do I make the knife not stick to you?

I'm making a throw knife script but when I throw it, Sometimes it sticks to me. I have a weld script so it sticks but I don't know how to make it so it doesn't stick to me and it sticks to other things.

Script:

local Tool = script.Parent

local HitSound = Instance.new("Sound")
HitSound.SoundId = "http://www.roblox.com/asset?id=153647563"
HitSound.Parent = Tool
HitSound.Volume = 0.5

function Stick(hit, player)
	local AV = Tool:findFirstChild("BodyForce")
	local FO = Tool:findFirstChild("BodyAngularVelocity")
	
	if AV ~= nil then AV:Destroy() end
	if FO ~= nil then FO:Destroy() end
	
	if hit.Parent.Name ~= player.Name then
		local weld = Instance.new("Weld")
		weld.Name = "PieWeld"
		weld.Part0 = Tool
		weld.Part1 = hit
		
		local backupweld = Instance.new("Weld")
		backupweld.Name = "PieWeldBackup"
		backupweld.Part0 = Tool
		backupweld.Part1 = hit
		
		local HitPos = Tool.Position
		
		local CJ = CFrame.new(HitPos)
		local C0 = Tool.CFrame:inverse() * CJ
		local C1 = hit.CFrame:inverse() * CJ
		
		weld.C0 = C0
		weld.C1 = C1
		
		weld.Parent = Tool
		
		backupweld.C0 = C0
		backupweld.C1 = C1
		
		backupweld.Parent = Tool
	end
end


function onTouched(hit, player)
	connection:disconnect()
	
	Stick(hit, player)
	HitSound:Play()
end

connection = Tool.Touched:connect(onTouched)

wait(2)

if Tool:FindFirstChild("PieWeld") ~= nil then
	Tool.PieWeld:Destroy()
end

wait(8)

Tool.Parent = nil

[Edit: This is a script, It should stick to others]

I would really appreciate it if you will help me with my problem, Plus I will accept your answer.

Thanks, MajinBluee