The courier suffers from disassociative fugues in which he is Not Himself. He's painfully aware that he slips into these things,but can't do shit to stop them.

He goes on a task with Waking Cloud, slips into a fugue, and forces himself on her.

I want whatever enterprising author taking this prompt on to play up the horror of it.

Bonus points if he comes out of it during the attack.

Please? I can think of few things more terrifying than the constant personal hell that is the knowledge you could flip out and harm someone for no reason!