how to make a humanoid animate on touch?

Ive got it to work when being touched, but it only works once, any suggestions?

local db = true
local animation = script:WaitForChild('Animation')
local humanoid = script.Parent:WaitForChild('Humanoid')
local anim = humanoid:LoadAnimation(animation)


script.Parent.Crate.Touched:connect(function(hit)
	if hit.Parent:FindFirstChild("Humanoid") ~= nil then
		if db == true then
			db = false
			anim:Play()
		end
	end
end)