I know what you mean Joanne. The laughing can just slide into crying.

When it hits, my hubby will ask, "why are you crying?". I'll just say " I have no idea". He has learned why. On the flip side he says that if he were on stage at a comedy club and I was in the audience when one of those episodes hits, he could be seen as the best comic ever.

I used to tell everyone it was because I was happy. I couldn't control it and though it wasn't frequent ..it was embarrassing at inappropriate times . I have not had that issue for years.

I am one that has always cried for no reason at all. This has happened since I was a small child

Oh Yes this has happened to Me quite a bit. It even wakes Me up some times where I am Laughing so hard. I can cry for no reason at all or Laugh for no reason at all.