Elias K. Mangosteen

I'd say that it (probably) counts as a flow state. It's certainly the case that the "no mind" in (various) martial arts has been called out as being one kind of flow state, and my recollection of the moments of when I've achieved that is, essentially, a black void, where I know what happened and I can describe it, but there's no actual memories of it happening, only of it having happened, if that makes any sense. Essentially a discontinuity in memory, with the events later back-filled, as it were.