Did I miss something? After taking all the precautions to tie Greg up so he couldn't hurt himself, why did they leave the room and close the door? Even before it was revealed that he still found a way to kill himself anyway, leaving the room made no narrative sense. Some of the group was skeptical that this would be any different than seeing the monsters in person, so why did no one at least stay in the room to communicate with Greg, or at the very least, observe to see if his behavior or demeanor changed in any way while watching the camera feed? They could stayed on the back side of the monitor, and if anything went wrong, avoided looking at the monitor and turned it facedown or smashed it just like they did when they re-entered the room.