I was around and did what I should do (buy more), even though it did not feel good. I was accumulating at the time, with good employment, so that provided a certain amount of safety. But I also remember being down six figures, which was a first and a bit surreal.
I went from about 90% equities to over 95% at the time. The one memory I have is audreyh1 posting about feeling not so good about rebalancing into a down market multiple times with no end in sight. I related to this, since I was doing the same and why after five years I still remember reading her words. The first time you do this, it's not so bad. After a few times, it doesn't feel that great. Makes you feel like you're just throwing away good money after bad. In the end, it all worked out, fortunately.
It makes me recall the quote from Fred Schwed, which I read in Bernstein's books, "Like all of life's rich emotional experiences, the full flavor of losing important money cannot be conveyed by literature. Art cannot convey to an inexperienced girl what it is truly like to be a wife and mother. There are certain things that cannot be adequately explained to a virgin either by words or pictures. Nor can any description I might offer here even approximate what it feels like to lose a real chunk of money that you used to own."