The last time that I did a heap of hand-washing in the laundry wash-trough, when I was swooshing dirty water down the drain of the trough that is poorly designed and doesn’t drain quickly I noticed that I very fleetingly “saw” in my mind’s eye scenes of a number of different places from my past, and they weren’t the places that I’ve previously noted have been evoked by this particular fine-motor task. It appears that the brain connections between learned hand movements and visual memories of scenes are more changeable or more random than in other types of synaesthesia that I also experience, like coloured letters (grapheme->colour synaesthesia). I think the interesting thing is that I do “see” visions of scenes when I do household chores with my hands. Why does this happen?
Report on my fine motor task -> visual place memory synaesthesia https://superrecognizer.wordpress.com/2011/02/20/report-on-my-fine-motor-task-visual-place-memory-synaesthesia/