Beautiful and terrifying story, the ending was different: but the experience was worth it! Proved something else.

"Guilt swept him".

"This was a heavy lie. Bravado".

I think he watched "The Fly" a few times before answering; demanded that the room and everything in it be sanitized, sprayed with insecticides, bactericides and alcohol 70. His hesitation almost got the experience cancelled, his ego led him to bravado.

"Guillaume — are you there?"

“I don't know. Are you?”

The monitors got drunk but proved that you can travel to another dimension