I've seen water slosh out of a pool during an earthquake, but nothing like that.

Especially considering the amount of earthquake activity that goes on from one day to the next.

I've lived through the Loma Prieta and there were two magnitude 7+ quakes in one night where I now live in the early 1990s and yes, you tend to cower in fear after experiencing such events.

We are NOT exempt!

& recommend!!!

And looks like there was a minor shake a few seconds before the big one.

At distance you only feel the S waves. The P waves are short frequency up/down shaking, the more damaging movement are the side to side S waves.

The camera's quick movement during the inital shaking was almost certainly P waves, and when the lower frequency but more powerful S waves became dominant the camera settled down and the water really started moving.