I played a game of chess six or seven hours into a mushroom trip last weekend, and it took me over 30 minutes to make my opening move.

I was caught up imagining all the opening moves I could make, what my opponents response to each opening might be, and how each scenario would likely unfold 6 or 7 moves in to the game. The board of 64 squares contained infinite possibilities.
So, yeah, all this sh*t was going on in my head but there was no movement on the real board at all. Much like our waking life!