EXTREME Lag from a simple .Touched function

[StonksMcHat]

Here you can see my basic rotating pads. They run a script that looks like this:

for _, part in script.Parent:GetChildren() do
	if part.Name == "Pads" then
		local bounce = {}

		part.Touched:connect(function(hit)
			if bounce[hit.Parent] then return end
			bounce[hit.Parent] = true
			task.delay(1, function()
				bounce[hit.Parent] = nil
			end)
			local Character = _G.ModelToCharacter[hit.Parent]
			if not Character then return end

			local velocity = ((Character.HRP.Position - hit.Position).Unit + Vector3.new(0, 1, 0)).Unit * 65
			Character:BounceDamage(10, part , velocity)
		end)
	end
end

BounceDamage inside the Character looks like this

function Character:BounceDamage(damage, Killer, velocity)
	if self.Bounce[Killer] then return false end
	
	self.Bounce[Killer] = true
	
	task.delay(.5, function()
		self.Bounce[Killer] = nil
	end)
	print("Take damage")
	return self:TakeDamage(damage, nil, velocity)
end

function Character:TakeDamage(damage, Killer, velocity)
	if self.isForceField or self.isLobbyCharacter then return false end
	
	if self.isBlocking and velocity then 
		if velocity:Dot(self.HRP.CFrame.lookVector) < 0 then 
			self.onBlocked:Fire()
			return false 
		end --Blocked
	end
	
	local humanoid = self.Humanoid
	
	self:PlaySound("Hit")
	
	if humanoid:GetAttribute("isDead") then 
		self:SetVelocity(velocity, .2)
		
		return false 
	end

	local prevHealth = humanoid:GetAttribute("Health")
	local isKilled = damage >= prevHealth
	if isKilled then
		damage = prevHealth
	end
	local health = prevHealth - damage
	humanoid:SetAttribute("Health", health)
	
	
	_G.FX("Hit", self.HRP)
	
	self:SetRagdoll(true)
	self:SetVelocity(velocity, .2)
	
	if velocity and velocity.magnitude > 50 then
		self:SetParticle("Smoke", true, 0.8)
	end
	
	if isKilled then
		humanoid:SetAttribute("isDead", true)
		
		self.onDeath:Fire(Killer)
		return true
	end

	if Killer and Killer.Player then
		_G.DropCoins(Killer.Player, self.HRP.Position, 10)
		Killer:GiveWeaponExperience(10)
	end
	
	
	task.delay(2, function()
		self:SetRagdoll(false)
	end)
end

And “Take damage” is just printed once. Even so, you can see how the entire screen freeze up.
Anyone have any qualified guesses as to why?

I use _G.ModelToCharacter in many scripts to get character (like when you tell server to attack) but nothing is using it as of this moment.

[TimeVector]

Your microprofiler shows that the frametime is fine, which is odd.

On first inspection, try looking at lines that can cause hanging, mainly the debounces and task.delay() lines.

[StonksMcHat]

Turns out it was setVelocity that set NaN velocity locally.