Thank you for this explanation. I've had this happen several times and you saying it's like the wiring is off resonates with me. It's different from when I smile to pretend I'm happy or be more likeable. To give an example, years ago my husbands grandfather died. When we went to his funeral, it was very moving and touching. He was a very impressive man with lots of good works and people who he inspired. I felt a wave of tears but I started laughing. I covered it but it was overwhelming and I was not happy of course and was horrified that I could barely contain myself. I finally got a grip but I was so scared it would happen again that we had to leave early. I didn't tell my husband about the laughter and don't think anyone noticed. If they would have, I'd have seemed to be a sociopath and I assure you I was very sad and the service was anything but funny. I'm diagnosed with SZA and I'm struggling to accept it .....this seems another reason to seriously consider the chance that I do. Like I said, this is different than putting on a brave face, though I do that too. It can be very challenging to deal with in certain situations. I also cry hysterically sometimes when I'm very happy. I know it's normal to get teary when overjoyed but this is different I think. I don't know if I've been in a mood episode everytime it's happened and most of the time it's annoying but not life altering....at funerals though it's unacceptable as people just wouldn't understand. I'm sorry you deal with this too.