More map breaking from the atomic bomb of map testing!
I broke the map again, RDZ...
After the immortal guy fights you (world's easiest fight with 3 water elementals by the way), you walk out. At first, I got confused by the fact you have to fight and beat the guard captain again (not what the quest said, so I summoned and ran, then came back to complete your script...). What happened next was that, just as I ended the second fight against the immortal guy, I finished the pig quest.
Result: I got moved inside the now closed and invulnerable gates, and could not get out.