On my first vacation to Korea, we lived in two large quanset huts with a latrine (bathroom to the uninitiated) between. One morning, while suffering a really bad bout of flu, I drug myself out of bed, and wobbled into the latrine which had one of those old gang urinals.
While standing there I started to weave back and forth. My first thought was that my flu was worse than I thought and I must be about to faint. I turned to a buddy who was shaving to tell him I might need help. I found him looking at me and then we both saw the light fixture swaying back and forth as I had been. Oh. OK, forget all alfter "Hey ..." and back to reality. We laughed at each other and ourselves, especially him as his wife was Japanese and he had spent enought time in Japan to have been through several small earthquakes.
That was only about my second one. Don't need any more either. You folks on the left coast can keep them all for my part, thanks.