Does ent:touch() return the worldspawn?

[Deception_]

I have a weapon script that has 5 different spell abilities.
[url]http://deception.esy.es/Media/Video/leetaddo.mp4[/url]
I have made an entity fireball that has fire particles and everything and when it touches a player/npc/entity it blows up and deals damage however I cannot get it to
blow up on conflict with the world which is the main objective of the fireball as it deals area damage, I know ent:touch doesn't work with the world so
I tried using ENT:PhysicsCollide() however it warned me about crashes in console and that got annoying. Does anyone know of any alternatives to my problem?

- Entity Code -

AddCSLuaFile("cl_init.lua")
AddCSLuaFile("shared.lua")
include("shared.lua")

function ENT:Initialize()
    self:SetModel("models/hunter/blocks/cube025x025x025.mdl")
    self:PhysicsInit(SOLID_VPHYSICS)
    self:SetSolid(SOLID_VPHYSICS)
    self:SetMoveType(MOVETYPE_VPHYSICS)
    self:SetTrigger(true)
    local phys = self:GetPhysicsObject()
    phys:SetMass(1)
    if phys:IsValid() then
        phys:Wake()
    end
    self:SetMaterial("Models/effects/vol_light001")
end


function ENT:Think()
	local part = EffectData()
	part:SetStart(self:GetPos() + Vector(0,0,7) )
	part:SetOrigin(self:GetPos() + Vector(0,0,7) )
	part:SetEntity(self)
	part:SetScale(20)
	util.Effect( "fireball", part)
        if !self:IsInWorld() then
         self:Remove()
       end	 
end



function ENT:Touch(ent)
    if ent == self:GetOwner() then 
    elseif ent:IsWorld() or ent:IsPlayer() or ent:IsNPC() then
     self:EmitSound( "ambient/explosions/explode_" .. math.random( 1, 3 ) .. ".wav" )
	for k,v in pairs(ents.FindInSphere(self:GetPos(), 400)) do
	 if v:IsPlayer() or v:IsNPC() then
	  if v != self:GetOwner() then
	  v:TakeDamage(100)
	  v:SetVelocity((v:GetPos() *15 - self:GetPos() *15) + Vector(0,0,240))
	  end 
	 end
	   self:Remove()
    end
 end
  print(ent)
end

Thanks in advance.

[editline]23rd January 2017[/editline]

Anyone? I'm guessing my question is stupid.

[thegrb93]

PhysicsCollide shouldn't give you warnings unless you're doing something wrong in it.

[editline]23rd January 2017[/editline]

Replace 'self:Remove()' with 'self.doremove = true', and replace 'if !self:IsInWorld() then' with 'if !self:IsInWorld() or self.doremove then' and you shouldn't get warnings with PhysicsCollide (maybe)

[Deception_]

Already fixed it. Thanks anyway though.