Step 10: Go Upside Down
This seems kind of simplistic, but turning upside down will change the way you perceive things on two levels. First, it will change your visual perspective. The ceiling becomes the floor. Floor lamps become chandeliers. Things in general just get strange. That aside, if you stay upside down for more than a few seconds, you will get a rush of blood to your head. The heart has not evolved not to pump blood against gravity very well and standing on your head means that more blood will settle there. Over a short period this will result in a mildly-altered state of consciousness. Over a long period, this can result in bad things like stroke, heart attack or blindness. I don't recommend standing on your head for very long.
While I initially resolved simply to lean upside down over the edge of the couch, I decided to go all out and fully stand on my head. I cannot remember the last time that I had stood on my head, and it was a bit more of a challenge than I remember. However, I leaned against a wall, and once I got up, I was very stable and confident in that position (minus the discomfort of my whole entire body weight pushing down on my neck). After about 30 seconds, my orientation changed and what was up was down; and down was now up.
I was just hanging out here checking things out for about another two to three minutes when I started to feel a throbbing pressure in my head. This was the feeling of blood rushing in. I held this for another 30 seconds and suddenly things did not feel quite right. I decided that perhaps balancing on my head in this state for much longer was not a good idea. I carefully returned to my feet and was very light-headed and dizzy. Aside from a stiff neck, things were feeling good, and perhaps I was imagining things, but my vision seemed sharper.