Needs fixing at line 50

-----------------
--| Constants |--
-----------------

local BLAST_RADIUS = 12
local BLAST_PRESSURE = 0

local RED_TEXTURE_ID = 'http://www.roblox.com/asset/?id=94691735'

--------------------
--| WaitForChild |--
--------------------

-- Waits for parent.child to exist, then returns it
local function WaitForChild(parent, childName)
	assert(parent, "ERROR: WaitForChild: parent is nil")
	while not parent:FindFirstChild(childName) do parent.ChildAdded:wait() end
	return parent[childName]
end

-----------------
--| Variables |--
-----------------

local DebrisService = Game:GetService('Debris')
local ContentProviderService = Game:GetService('ContentProvider')

local TimeBomb = script.Parent

local BombMesh = WaitForChild(TimeBomb, 'Mesh')

local BoomSound = WaitForChild(TimeBomb, 'Boom')
local BeepSound = WaitForChild(TimeBomb, 'Beep')

local CreatorTag = WaitForChild(TimeBomb, 'creator')

local OriginalTextureId = BombMesh.TextureId

local Connection = nil

local ParentTorso = WaitForChild(TimeBomb, 'ParentTorso')
local XGraceDistance=2.5
local YGraceDistance=2.5

-----------------
--| Functions |--
-----------------

-- Returns the ancestor that contains a Humanoid, if it exists
local function FindCharacterAncestor(subject)
	if subject and subject ~= Workspace then
		local humanoid = subject:FindFirstChild('Humanoid')
		if humanoid then
			return subject, humanoid
		else
			return FindCharacterAncestor(subject.Parent)
		end
	end
	return nil
end

-- When a player is hit, if they are alive they will be tagged
local function OnExplosionHit(hitPart)
	if hitPart then
		local _, humanoid = FindCharacterAncestor(hitPart.Parent)
		if humanoid and humanoid.Health > 0 then
			humanoid:TakeDamage(50)
			end
		end
	end

-- Needless to say, this should only be called once
local function Explode()
	local explosion = Instance.new('Explosion')
	explosion.BlastRadius = BLAST_RADIUS
	explosion.BlastPressure = BLAST_PRESSURE
	explosion.Position = TimeBomb.Position
	explosion.Hit:connect(OnExplosionHit)
	explosion.Parent = Workspace

	BoomSound:Play()

	-- NOTE:
	-- If we just destroyed the bomb at this point, the boom sound would be destroyed too,
	-- so instead we will hide the bomb, keep it in the same spot, and schedule it for deletion

	TimeBomb.Transparency = 1
	TimeBomb.CanCollide = false
	TimeBomb.Anchored = true
	DebrisService:AddItem(TimeBomb, 3)
end

--------------------
--| Script Logic |--
--------------------

--Distance check to see if can collide should be true
Spawn(function()
	while not TimeBomb.CanCollide and ParentTorso.Value do
		local TorsoPosition = ParentTorso.Value.CFrame.p
		local XZOffset = TorsoPosition-Vector3.new(TimeBomb.CFrame.p.x,TorsoPosition.y,TimeBomb.CFrame.p.z)
		if XZOffset.magnitude>XGraceDistance or math.abs(TorsoPosition.y-TimeBomb.CFrame.p.y)>YGraceDistance then
			TimeBomb.CanCollide=true
		end
		wait(1/30)
	end
end)

-- Flash red and beep increasingly fast for about 3 seconds
local tickTime = 0.4
local red = true
repeat
	BombMesh.TextureId = red and RED_TEXTURE_ID or OriginalTextureId
	BeepSound:Play()
	wait(tickTime)
	red = not red
	tickTime = tickTime * 0.9
until tickTime < 0.1

Explode()
Anonymous