Ever done ACID? It can induce a variety of perceptual anomalies (for lack of a better term). I once saw the world in flat 2D, as if every object were made of p

Ever done ACID? It can induce a variety of perceptual anomalies (for lack of a better term). I once saw the world in flat 2D, as if every object were made of paper cutouts. Then everything went plaid.