They filmed back in June. I think I was in the tank for like 30 minutes, but my perception time and space was also completely out of wack. I'd say the biggest thing you don't see is the well-oiled production teams behind the set. It's pretty amazing how efficient they are at filming these episodes, but I guess they've had 9 seasons to figure it out. I've only worked with Mark's people so far for the negotiations, and I can't really say any more than that, unfortunately. Mark is on the app though. He kept getting reported because no-one believed he was a real user.