// To make fists hurt NPCs
local meta = FindMetaTable( "Entity" ) 
local oin = meta.IsNPC 
function meta:IsNPC( ) 
	if not IsValid( self ) then return false end
	if table.HasValue( zombiesList, self:GetClass( ) ) then 
		return true 
	else 
		return oin( self ) 
	end 
end