Prop Gun Help

[arandom]

So, I have been messing around with the code for the "chair throwing gun", [URL="http://wiki.garrysmod.com/page/Chair_Throwing_Gun"]found here.[/URL] and I have been messing around with it, and trying to get things to work, but I'm having two problems.
1. I get kicked with the error below, when the prop tries to delete itself.
[IMG]http://i.imgur.com/pXRHhxy.png[/IMG]

2. It plays both ShootSound and TauntSound when I shoot, but only plays TauntSound when I taunt.

Here is my current code for it.

Look below.

Thanks for reading, I am new to programming, and I am trying to get better by messing around with other bits and pieces of code.
Any help will probably help me out, thanks! :p

[arandom]

Bump?
Also, cleaned up the code a bit.

-- Variables that are used on both client and server

SWEP.Author			= ""
SWEP.Contact		= ""
SWEP.Purpose		= ""
SWEP.Instructions	= "Left click to shoot a turtle. Right click to taunt."

SWEP.Spawnable			= true
SWEP.AdminOnly			= true
SWEP.UseHands			= true

SWEP.ViewModel			= "models/weapons/c_toolgun.mdl"
SWEP.WorldModel			= "models/weapons/w_toolgun.mdl"

SWEP.Primary.ClipSize		= -1
SWEP.Primary.DefaultClip	= -1
SWEP.Primary.Automatic		= false
SWEP.Primary.Ammo			= "none"

SWEP.Secondary.ClipSize		= -1
SWEP.Secondary.DefaultClip	= -1
SWEP.Secondary.Automatic	= false
SWEP.Secondary.Ammo			= "none"

SWEP.Weight				= 5
SWEP.AutoSwitchTo		= false
SWEP.AutoSwitchFrom		= false

SWEP.PrintName			= "Turtle Shooter"			
SWEP.Slot				= 3
SWEP.SlotPos			= 1
SWEP.DrawAmmo			= false
SWEP.DrawCrosshair		= false
SWEP.UseHands			= true




local ShootSound = Sound( "FX_RicochetSound.Ricochet" )
local TauntSound = Sound( "Doll.Squeak" )

--[[---------------------------------------------------------
	Reload does nothing
-----------------------------------------------------------]]
function SWEP:Reload()
end

--[[---------------------------------------------------------
   Think does nothing
-----------------------------------------------------------]]
function SWEP:Think()	
end


--[[---------------------------------------------------------
	PrimaryAttack
-----------------------------------------------------------]]
function SWEP:PrimaryAttack()

	self.Weapon:SetNextPrimaryFire( CurTime() + 7.5 )	

	self:ThrowChair( "models/props/de_tides/vending_turtle.mdl" )
	
	self:EmitSound( ShootSound )

	timer.Simple(2, function() 
	if ThrowChair:IsValid() then ThrowChair:Remove() end
	end)

end
 

function SWEP:SecondaryAttack()

	self.Weapon:SetNextPrimaryFire( CurTime() + 1.5 )	

	self:ThrowChair( "" )

end

function SWEP:ThrowChair( model_file )

	self:EmitSound( TauntSound )

 
	if ( CLIENT ) then return end

	local ent = ents.Create( "prop_physics" )

	if (  !IsValid( ent ) ) then return end

	ent:SetModel( model_file )
 
	ent:SetPos( self.Owner:EyePos() + ( self.Owner:GetAimVector() * 16 ) )
	ent:SetAngles( self.Owner:EyeAngles() )
	ent:Spawn()
 

	local phys = ent:GetPhysicsObject()
	if (  !IsValid( phys ) ) then ent:Remove() return end
 
 
	local velocity = self.Owner:GetAimVector()
	velocity = velocity * 2225 
	velocity = velocity + ( VectorRand() * 10 )
	phys:ApplyForceCenter( velocity )
 
	cleanup.Add( self.Owner, "props", ent )
 
	undo.Create( "Thrown_Chair" )
		undo.AddEntity( ent )
		undo.SetPlayer( self.Owner )
	undo.Finish()
end

--[[---------------------------------------------------------
   Name: ShouldDropOnDie
   Desc: Should this weapon be dropped when its owner dies?
-----------------------------------------------------------]]
function SWEP:ShouldDropOnDie()
	return false
end

[boxama]

[lua]
-- Variables that are used on both client and server

SWEP.Author = ""
SWEP.Contact = ""
SWEP.Purpose = ""
SWEP.Instructions = "Left click to shoot a turtle. Right click to taunt."

SWEP.Spawnable = true
SWEP.AdminOnly = true
SWEP.UseHands = true

SWEP.ViewModel = "models/weapons/c_toolgun.mdl"
SWEP.WorldModel = "models/weapons/w_toolgun.mdl"

SWEP.Primary.ClipSize = -1
SWEP.Primary.DefaultClip = -1
SWEP.Primary.Automatic = false
SWEP.Primary.Ammo = "none"

SWEP.Secondary.ClipSize = -1
SWEP.Secondary.DefaultClip = -1
SWEP.Secondary.Automatic = false
SWEP.Secondary.Ammo = "none"

SWEP.Weight = 5
SWEP.AutoSwitchTo = false
SWEP.AutoSwitchFrom = false

SWEP.PrintName = "Turtle Shooter"
SWEP.Slot = 3
SWEP.SlotPos = 1
SWEP.DrawAmmo = false
SWEP.DrawCrosshair = false
SWEP.UseHands = true

local ShootSound = Sound( "FX_RicochetSound.Ricochet" )
local TauntSound = Sound( "Doll.Squeak" )

--[[---------------------------------------------------------
Reload does nothing
-----------------------------------------------------------]]
function SWEP:Reload()
end

--[[---------------------------------------------------------
Think does nothing
-----------------------------------------------------------]]
function SWEP:Think()
end

--[[---------------------------------------------------------
PrimaryAttack
-----------------------------------------------------------]]
function SWEP:PrimaryAttack()

self.Weapon:SetNextPrimaryFire( CurTime() + 7.5 )

self:ThrowChair()

self:EmitSound( ShootSound )

timer.Simple(2, function()
if self.chair:IsValid() then self.chair:Remove() end
end)

end

function SWEP:SecondaryAttack()

self.Weapon:SetNextPrimaryFire( CurTime() + 1.5 )

self:ThrowChair()

end

function SWEP:ThrowChair()

self:EmitSound( TauntSound )

if ( CLIENT ) then return end

local ent = ents.Create( "prop_physics" )

if ( !IsValid( ent ) ) then return end

ent:SetModel( "props_c17/FurnitureChair001a.mdl" )

ent:SetPos( self.Owner:EyePos() + ( self.Owner:GetAimVector() * 16 ) )
ent:SetAngles( self.Owner:EyeAngles() )
ent:Spawn()
self.chair = ent

local phys = ent:GetPhysicsObject()
if ( !IsValid( phys ) ) then ent:Remove() return end

local velocity = self.Owner:GetAimVector()
velocity = velocity * 2225
velocity = velocity + ( VectorRand() * 10 )
phys:ApplyForceCenter( velocity )

cleanup.Add( self.Owner, "props", ent )

undo.Create( "Thrown_Chair" )
undo.AddEntity( ent )
undo.SetPlayer( self.Owner )
undo.Finish()
end

--[[---------------------------------------------------------
Name: ShouldDropOnDie
Desc: Should this weapon be dropped when its owner dies?
-----------------------------------------------------------]]
function SWEP:ShouldDropOnDie()
return false
end
[/lua]
I fixed everything I saw wrong with it.