Roblox Fire Extinguisher with Remote Events not working?

The scripts aren't showing any signs of working, the only is error is: " 11:28:20.502 - Players.Gameplay28.Backpack.FireExtinguisher.FireEvent.Script:21: attempt to index a nil value" which I'm guessing is because the Fire Extinguisher goes into the character when equiped. So how do I fix this, is there a way I can get the character from the player?

Server Script:

local debounce = false
local timedebounce = 0.1
local spraying = false
local torso = nil
local offset = 5
local debris = game:GetService("Debris")

game.ReplicatedStorage.BubbleEvent1.OnServerEvent:Connect(function(player)
	print(player.Backpack:FindFirstChild("FireExtinguisher"))
torso = player.Backpack:FindFirstChild("FireExtinguisher").Parent:FindFirstChild("Torso", false) or player.Backpack:FindFirstChild("FireExtinguisher").Parent:FindFirstChild("UpperTorso", false)
end)

game.ReplicatedStorage.BubbleEvent2.OnServerEvent:Connect(function(player)
spraying = false
	player.Backpack:FindFirstChild("FireExtinguisher").Handle.Mesh.MeshId = "http://www.roblox.com/asset/?id=27787143"
	player.Backpack:FindFirstChild("FireExtinguisher").Handle.FoamSound:Stop()
	end)

game.ReplicatedStorage.BubbleEvent3.OnServerEvent:Connect(function(player)
	spraying = true
	player.Backpack:FindFirstChild("FireExtinguisher").Handle.Mesh.MeshId = "http://www.roblox.com/asset/?id=27787226"
	player.Backpack:FindFirstChild("FireExtinguisher").Handle.FoamSound:Play()
	sprayBubbles()
end)

game.ReplicatedStorage.BubbleEvent4.OnServerEvent:Connect(function()
	spraying = false
	player.Backpack:FindFirstChild("FireExtinguisher").Handle.Mesh.MeshId = "http://www.roblox.com/asset/?id=27787143"
	player.Backpack:FindFirstChild("FireExtinguisher").Handle.FoamSound:Stop()
end)

game.ReplicatedStorage.BubbleEvent5.OnServerEvent:Connect(function()
	while spraying do
		
		local sprayDir = torso.CFrame.lookVector.unit

		local bubbleClone = bubble:clone()
		local torsoNormal = torso.CFrame.lookVector
		local denom = math.abs(torsoNormal.x) + math.abs(torsoNormal.z)
		local posX = 5 * (torsoNormal.x/denom)
		local posZ = 5 * (torsoNormal.z/denom)
		bubbleClone.Position = Vector3.new(player.Backpack:FindFirstChild("FireExtinguisher").Handle.Position.x + posX,player.Backpack:FindFirstChild("FireExtinguisher").Handle.Position.y,player.Backpack:FindFirstChild("FireExtinguisher").Handle.Position.z + posZ)
		bubbleClone.Velocity = Vector3.new(sprayDir.x,sprayDir.y + 0.5, sprayDir.z) * 50
		bubbleClone.Size = Vector3.new(math.random(1,2),math.random(1,2),math.random(1,2))
		bubbleClone.Parent = game.Workspace
		game.ReplicatedStorage.BubbleEvent5:FireServer()
	end
		bubbleClone.Touched:Connect(function(h)
			for i,v in pairs(h:GetChildren()) do
				if v:IsA("ParticleEmitter") then
					script.Parent.FireEvent:FireServer(v)
				end
				end
			wait(0.05)
debris:AddItem(bubbleClone, 2)
	end)
	end)
script.Parent.OnServerEvent:Connect(function(p,fire)
	if p.Name == script.Parent.Parent.Parent.Name then
	if fire.Enabled == false or debounce == true then
		return
	end
	print(fire.Parent)
	if fire.Rate <= 0 then
		fire.Enabled = false
	end
	fire.Rate = fire.Rate - 2
	debounce = true
	wait(timedebounce)
	debounce = false
	end
end)

Local Script:

local Tool = script.Parent
local spraying = false
local torso = nil
local offset = 5
local debris = game:GetService("Debris")

local bubble = Instance.new("Part")
bubble.Shape = 0
bubble.formFactor = 0
bubble.Size = Vector3.new(1,1,1)
bubble.Transparency = 0.2
bubble.BottomSurface = "Smooth"
bubble.TopSurface = "Smooth"
bubble.CanCollide = true

function onEquipped(mouse)
	mouse.Button1Down:connect(onButton1Down)
	mouse.Button1Up:connect(onButton1Up)
	game.ReplicatedStorage.BubbleEvent1:FireServer()
end

function onUnequipped()
	game.ReplicatedStorage.BubbleEvent2:FireServer()

end

function onButton1Down(mouse)
game.ReplicatedStorage.BubbleEvent3:FireServer()
end

function onButton1Up(mouse)
	game.ReplicatedStorage.BubbleEvent4:FireServer()
end

function sprayBubbles()
		wait()
game.ReplicatedStorage.BubbleEvent5:FireServer()
		end
Tool.Equipped:connect(onEquipped)
Tool.Unequipped:connect(onUnequipped)