I experienced my first earthquake in Japan. I was sleeping with the window open and had a bag hanging on a nearby shelf. I woke up and the wind was blowing, and the bag was shaking. But as I woke up more, I realized that the wind wouldn't really move the heavy bag like that, and then realized that it was the building that was moving and the bag was mostly remaining still.

Rather soothing actually. I always enjoy flights where there are some turbulence; helps me sleep better.