My nose is now bleeding for no apparent reason, and the minute the lights go out, my brain insists on inserting another dimension's perpendicular into my perception of my surroundings. Also if I lie on my front, it feels like I am about to slide off the bed feet first; if I lie on my back, it feels like I am about to slide off the bed head first (and occasionally curving around to the rightish), and if I lie on my side, it feels like I'm going to do a widening nautilus spiral around the axis of curling up, with some of the curve being in the aforementioned new, nonexistent dimension.
Some people pay money for drugs to feel like this. I don't care what you say about the price of oatmeal, those people are dumb and should, if that's their interest, save up for better drugs.
Also, a thorough grounding in the theory of Hilbert spaces is not the comfort I generally find it to be. Et tu, Math Methods?