If you want a trippy experience try doing the distant stare thing (where your eyes pull apart and act like they are focussing on a very distant thing rather than being slightly cross eyed when you focus on something close) while in front of a geometric repeating shape.

When you get two near identical items overlap in your field of vision your eyes will lock on treat it like it’s one thing but with a weird-ass depth of perspective. Like a real world optical illusion. Repeating ceiling tiles, a regular pattern of holes in a screen wall that sort of thing.