I do this during conversation, usually with T. I've never told her about it though. I do this most while driving. It's very scary for me and I usually end up getting lost in areas I know very well. My 6yr old is always asking me if I'm lost because I seem to blank out and get frustrated once I figure out that I was driving and don't know where I'm at. The only thing I can think of for a trigger is I was in a bad accident 10yrs ago and driving causes so much anxiety for me that it's my brains way of dealing with it.