Booze does do that if it is still in your system. Plus I've got a pretty good hunch that there was something slipped in there. And if not if he was drunk enough to pass out then it's hard to control your limbs. Trust me. I've been there a too many a times. I was always with good friends so they watched out for me but you literally cannot even walk once you breach your knock out point.
I actually heard a true horror story told by a woman who had something slipped in her drink that contained something that actually paralyzed her. She said she couldn't move her legs or have a grip on things so she sank to the floor and tried to crawl away. If she hadn't had her phone with her, she wouldn't have been able to call for help before anything happened. I wonder if the same happened to the uke

Not trying to devalue how horrified this guy must be to wake up drunk and find himself being raped, but like, why can't he just move? Why not punch the guy? I know some rape victims are too afraid to fight their attacker but this doesn't seem like that kind of situation. This seems hella dumb like "I shouldn't but it feels good so I don't wanna be the one to stop it"