As someone who has aphantasia I did the same thing, but with motes of dust on the window. I’d stare at a single bit of dust or dirt and move my head up and down to make the dirt move with the landscape. It’s funny to read these stories because it solidifies my assumption that I have aphantasia. I did the same thing as a child just without the imagery.
This is super interesting to me. A lot of threads about aphantasia devolve into both sides being mildly incredulous that the other exists, I think partially because it's _hard_ for us to imagine experiences outside of our own.
But here, I feel like we have a clear delineation of the differences between experiences, in a non-abstract way... and that feels more valuable to me, somehow.