I had a weird experience with my mother today. She has Alzheimer's and vascular dementia, mid- stage. We were having a (relatively) normal discussion when all at once she began talking about me as if she were discussing me with some other person, as if I wasn't there! It was all negative trash-talk, "Amber said blah-blah" and "Amber did thus and so." I made no attempt to re-orient her, not wanting to alarm her or cause a catastrophic reaction. Instead, I kept trying to redirect her to a different topic, which would work momentarily, but she kept returning to the same negative comments to me (about me) as if I wasn't there. We were in the car, just the two of us. Finally, after 10 minutes of going around and around like this, she dropped it. Is this a common dementia behavior? Did I handle it appropriately?