Seeing everything as moving subatomic particles

“Having a direct experience of seeing everything one looks at (including one’s own body) as moving subatomic particles alters the perception of ‘me’ and of the substantiality of what we regard as ‘normal’ reality.”

(I can’t remember where I saw this quote, but I think it had to do with some sort of system that you could walk into and see your body as moving subatomic particles.)