 The Mayo Clinic says he's got some classic signs, and they say it's called sundowning. It references a state of confusion that affects elders, he is, particularly those who have Alzheimer's disease or types of dementia during the evening as the sun's beginning to set. This, according to the Mayo Clinic, more extreme cases of sundowning result in anxiety, aggression, and pacing and wandering, even hallucinations and trouble sleeping. And that's what's going on.