How would I play this animation?

local animController = Instance.new("AnimationController")
local animTrack = animController:LoadAnimation(animation)
animTrack:Play()

With clicking the humanoid this would work

For a player:

local animation = Instance.new("Animation")
animation.AnimationId = "http://www.roblox.com/Asset?ID=144884906" -- your id here

local animTrack = Humanoid:LoadAnimation(animation) -- chanhe Humanoid to the target's Humanoid
animTrack:Play()

For something else:

local animation = Instance.new("Animation")
animation.AnimationId = "http://www.roblox.com/Asset?ID=144884906" -- your id here

local animController = Instance.new("AnimationController")
local animTrack = animController:LoadAnimation(animation)
animTrack:Play()

If you wanna launch it when a character's part is clicked, you could connect it via a Button1Down event You could also (though the cursor looks ugly if you don't change it) use a ClickDetector

example:

local animation = Instance.new("Animation")
animation.AnimationId = "http://www.roblox.com/Asset?ID=144884906" -- your id here

local animController = Instance.new("AnimationController")
local animTrack = animController:LoadAnimation(animation)

game.Players.LocalPlayer:GetMouse().Button1Down:connect(function()
	if game.Players.LocalPlayer:GetMouse().Target==thePartInTheModel then
		animTrack:Play()
	end
end)

I tried this script and it just freezes studio :(

A script inside the Torso (with the Clickdetector already inside)

script.Parent.ClickDetector.MouseClick:connect(function(playerWhoClicked)
local animation = Instance.new("Animation")
animation.AnimationId = "http://www.roblox.com/Asset?ID=144884906" -- your id here

local animTrack =script.Parent.Parent:FindFirstChild("Humanoid"):LoadAnimation(animation) -- change Humanoid to the target's Humanoid

animTrack:Play()

end)