Artificially stimulated Extra Perceptory Illusions.
I do not know why, but YouTube made a wrong link to this video, and it starts some random seconds after the actual beginning.
It happens on several videos and I cannot manually change it, it’s YouTube’s FAULT.
As usual, overlaying some time-delayed instances (i.e.: 30 secs or more per
layer) enrichens the overall experience – try to match (or cleverly mismatch)
the rhythms, if any.