You're in a rocket on top of thousands of tons of explosives, everything runs automatically, there's terrifying noise all around and you don't control anything.

Blacking out in dissociative euphoria still sounds like a feature, not a bug to me.

I suppose that if we ever develop some sort of hypersleep/suspended animation or whatever we want to call it then being dissociated by a noble gas before the system kicks in might be a good idea.