Basically? It's a "sense" or "vibe". "There was a guy begging on the street" is what I remember. Not the actual words or a picture, just the "vibe" of that sentence. Definitely no touches, sounds, smells, or pictures.

My wife, who has a very visual and auditory memory, to the point that she can basically re-watch movies in her head, is still dumbfounded by this fact.