What happens in sundowning?

I think it would, in the common vernacular, be called sort of a meltdown. It’s just like this mounting frustration just bubbles over. There’s a spectrum, so it’s far milder than with others where they might become so frustrated that they’re throwing things or maybe grabbing at their hair, they’re showing an enormous amount of frustration and an inability to soothe themselves. Some people do have problems with hallucinations that are distressful or some huge delusions that are just stressful.