Attack script works on NPCs but does not work on players?

so i got this script that damages players, and makes a part that welds to the damaged player then the part welds to your hand, and its just used for looks but it doesn't work on players at all. It works on npcs 100% of the time but for players it completely ignores them and just does the damage part. Heres a stripped down version of my code:

local Part = enemyplayer.Character.HumanoidRootPart --(placeholder)
local player = Nikkted -- me
local humanoidRootpart = Nikkted.Character.HumanoidRootPart

    spawn(function()
        local explosionPart = Instance.new("Part", player.Character)
        explosionPart.Parent = player.Character
        explosionPart.Anchored = false
        explosionPart.Massless = true
        explosionPart.CanCollide = false
        explosionPart.Size = Vector3.new(0.616, 0.104,30)
        explosionPart.BrickColor = BrickColor.new("New Yeller")
        explosionPart.Material = Enum.Material.Neon
        explosionPart.Transparency = 0
        explosionPart.CFrame =                   player.Character.HumanoidRootPart.CFrame*CFrame.new(0,1,-89)
        local weld = Instance.new("Weld",player.Character.RightHand)
        weld.Part1 = player.Character.RightHand
        weld.Part0 = explosionPart
        weld.C0 = CFrame.new(0,0,15)*CFrame.Angles(math.pi/2,math.pi,0)
        local attachment0 = Instance.new("Attachment",explosionPart)
        attachment0.Position = Vector3.new(0,0,15)
        local attachment1 = Instance.new("Attachment",explosionPart)
        attachment1.Position = Vector3.new(0,0,-15)
        local Stars = script.Stars:Clone()
        Stars.Parent = explosionPart
        local trail = script.Trail:Clone()
        trail.Parent = explosionPart
        trail.Attachment0 = attachment0
        trail.Attachment1 = attachment1
        part.Parent = player.Character
        part.Anchored = false
        part.Massless = true
        part.CanCollide = false
        part.CFrame = player.Character.RightHand.CFrame
        local weld = Instance.new("Weld",player.Character.RightHand)
        weld.Part1 = player.Character.RightHand
        weld.Part0 = part
        weld.C0 = CFrame.new(0,0,0)]]

        local particle = script.Inside:Clone()
        particle.Parent = player.Character.RightHand.Right
        game.Debris:AddItem(particle,2)

        for _,v in pairs(Part.Parent:GetDescendants()) do
            if v:IsA("BasePart") then
                --v:SetNetworkOwner(plr)
                v.Massless = true
            end
        end

        local Weld = Instance.new("ManualWeld")
        Weld.Name = "DetainWeld"
        Weld.Parent = explosionPart
        Weld.Part0, Weld.Part1 = Weld.Parent, Part.Parent.PrimaryPart
        Weld.C0 = Weld.Parent.CFrame:inverse()
        Weld.C1 = CFrame.new((Weld.Parent.Position + Weld.Parent.CFrame.LookVector * 3), Weld.Parent.Position + Weld.Parent.CFrame.LookVector):inverse()
        game.Debris:AddItem(Weld,3)
        local anim = Part.Parent.Humanoid:LoadAnimation(script.Stun)
        anim:Play()

        local player2 = game.Players:GetPlayerFromCharacter(enemyHumanoid.Parent)
        if player2 ~= nil then
                                    game.ReplicatedStorage.StunRemote:FireClient(player2,false)
        end

        spawn(function()
            wait(.8)
            for i = 1,20 do
                wait()
                explosionPart.Transparency = explosionPart.Transparency+(0.05)
            end
            wait(.15)
            explosionPart:Destroy()
            weld:Destroy()
        end)
        wait(.9)
        local sound = script.Knockback:Clone()
        sound.Volume = 1
        sound.Parent = Part.Parent.Head
        sound:Destroy()
        wait(.475)
        particle:Destroy()
        Weld:Destroy()

        for _,v in pairs(Part.Parent:GetDescendants()) do
            if v:IsA("BasePart") then
                --v:SetNetworkOwner(plr)
                v.Massless = false
            end
        end                         
        Part.Parent.HumanoidRootPart.CFrame = player.Character.HumanoidRootPart.CFrame*CFrame.new(0,0,-10)
        local bodyVelocity = Instance.new("BodyVelocity", Part.Parent.HumanoidRootPart)
        bodyVelocity.MaxForce = Vector3.new(math.huge,math.huge,math.huge)
        bodyVelocity.Velocity = CFrame.new(humanoidRootPart.Position, mouseHit).lookVector * 100    
        game.Debris:AddItem(bodyVelocity,.6)
        wait(.5)
        bodyVelocity:Destroy()
        explosionPart:Destroy()
        anim:Stop()
    end)                            
-------------------------------         
    if enemyHumanoid and enemyHumanoid.Health > 0 then
        enemyHumanoid:TakeDamage(100)
    end
-------------------------------

i don't see where the barrier between whats a player and whats an npc stops it from working on players is it because welding players to players doesn't work or something? idk if I'm missing something but I hope you guys could help me out <3