Handcuff script is making my player not be able to move?

local RemoteEvent = script.Parent.RemoteEvent
local Using = false
local TargetTorso
local weld

function CheckForChar(Part)
	if Part.Parent:IsA('Model') and Part.Parent:FindFirstChildOfClass('Humanoid') then
		local Char = Part.Parent
		TargetTorso = Char:WaitForChild("HumanoidRootPart") 
		return Char
	end
end

function CheckForTorso(player)
	local Char = player.Character
	if Char:FindFirstChild('Torso') then
		return Char.Torso
	else 
		return Char.UpperTorso
	end
end

RemoteEvent.OnServerEvent:Connect(function(player, one, two)
	if one == 'Cuff' then
		local Target = CheckForChar(two)		
		local PlayerTorso = CheckForTorso(player)
		
		if Target then
			Using = true
			RemoteEvent:FireClient(player,'Use') 

			weld = Instance.new("Weld")
			weld.Part0 = PlayerTorso
			weld.Part1 = TargetTorso
			weld.C0 = CFrame.new(0,0,-3.5)
			weld.Parent = PlayerTorso
		end
	elseif one == 'UnCuff'then
		Using = false		
		weld:Destroy()
	end
end)

For some reason the player who got cuffed is able to move very slowly while the person using the cuffs can't move at all, anyone know how I could fix this?