How to add extra parts to a player animation?

I'm trying to make an emote that uses a hammer and smashes the ground, but the problem is the player can't use the hammer. Here's the code.

game.Players.PlayerAdded:connect(function(Plr)
Plr.Chatted:connect(function(msg)
if msg == "/e hammer" then
A = Instance.new("Animation", Plr.Character)
A.AnimationId = "https://www.roblox.com/Hammer-Blow-item?id=479739350"

track = Plr.Character.Humanoid:LoadAnimation(A)
track:Play()
end
end)
end)

I'm using Animation Editor 3.3.1