Okay Julien is going to - first of all, turn on the light and close the door behind him, and then do brains about the window before making sure the curtains are as tight and opaque as he can make them, and then - get in the bed, and with the lights and sunglasses on, try and endure the next however many hours.
He does, despite himself, drift off at a few points. He dreams of being chased through warehouses, of being caught and torn apart, of being stitched back together in new configurations. Of being eaten by a tiger or lion or something - he only sees the eyes, while it's stalking him, and then the inside of the mouth, while he's being eaten, and then transforming inside it, as the acid sizzles him away, into something even more large and awful and powerful, with lots of limbs, wings and tentacles and wolf-legs and eyes - and he claws and strains and bursts his way out - it was a leopard, looks like - and then there's the people who failed to save him (were they there, when he was being hunted? ...it's still their fault, their fault and his right); he reaches for them and grasps them and shovels them into his great mouth -
He wakes up and, right, the light's on and he's in this room, this strange room - aaaa he can see his body and everything is - still the same. So far. It stays still the same. He feels really bad, he - bites his arm, not that hard, until he feels enough better to stop doing that. He is not going to torture himself for their benefit, they're going to have to put in the work for that, but he - he's allowed to ground himself. It helped.
The rest of the night continues in much the same way. He tries to keep the pain to a minimum but everything is so bad and after another few rounds of nightmares he ends up pressing his other arm into the corner of the nightstand until he feels like he can breathe again. And then he's really really very definitely not allowed to do anything more because the marks might not fade by morning and someone might take that as evidence that he wants to be hurt a lot more. So instead he just curls up as tight as he can go, clenching all his muscles, and - it's really not as good but he doesn't die of it not being as good, or anything.