Having wisdom teeth out was also a fascinating experience for me for similar reasons, but I don’t know what I did in that lucid-but-amnesiac (and for all I know actually unconscious?) interval. I did apparently walk to the recovery room under my own power, so while I don’t think I was asking questions or solving math problems, I was at least navigating under my own power and avoiding running into walls. What really sticks in my mind was that I had this experience of “coming to”, like almost identical to the sensation of waking up except without feeling like I had just been asleep. It wasn’t that different from other experience where I’d had a lapse of awareness and come back suddenly to awareness of the present moment, but the discontinuity was more dramatic.
(As a side note, I love the thought of smuggling a short-term memory out of a period of memory loss by hiding it in a long-term memory. No idea whether I’d expect that to actually work, but definitely a creative approach to the problem.)
Wastes is not a basic land type. It is a name of a card that is a basic land which has no basic land type (or other subtype, for that matter). So it is considered by effects that look for “a basic land”, but not cards that look for “land card with a basic land type” (like Boseiju, Who Endures) or count the number of basic land types you have (like cards with Domain).