Why won't this ENT:Think() work?

[baldursgate3]

What i'm trying to do is to constantly add velocity to props around an entity.
For example, a black hole device of some sort.

function ENT:Think()
if (SERVER) then
if !IsValid() then return end
local pos = self:GetPos()
local dmg = DamageInfo()
dmg:SetDamage(self.DamageAmount)
dmg:SetDamageType(self.DamageType)
dmg:SetAttacker(self.GBOWNER)
self.Bursts = self.Bursts + 1
if (self.Bursts >= self.Lifetime) then
print("self.removed")
self:Remove()
elseif (self.Exploded) then
print("elseif (self.Exploded) then")
for k, v in pairs(ents.FindInSphere(pos,self.SpecialRadius)) do
if IsValid(v) then
--local phys = v:GetPhysicsObject()
local i = 0
while i < v:GetPhysicsObjectCount() do
print("WHILE")
phys = v:GetPhysicsObjectNum(i)
if (IsValid(phys)) then
local mass = phys:GetMass()
local F_ang = self.PhysForce
local dist = (pos - v:GetPos()):Length()
local relation = math.Clamp((self.SpecialRadius - dist) / self.SpecialRadius, 0,1)
local F_dir = (v:GetPos() - pos):GetNormal() * self.PhysForce
if(GetConVar("gb_unfreeze"):GetInt() >= 1) then
phys:Wake()
phys:EnableMotion(true)
end
phys:AddAngleVelocity(Vector(F_ang, F_ang, F_ang) * relation)
phys:AddVelocity(F_dir)
end
i = i + 1
end
end

end
end
self:NextThink(CurTime() + self.DamageDelay)
return true
end
end

[Rubat]

There's your problem: if !IsValid() then return end

For future, use

 tags.