What Happens In Your Brain When You Can’t Stop Laughing?

London (The Conversation): Do you remember the last time you were laughing and simply could not stop? Perhaps it was a situation when you should not have been laughing at all. This happened to one of us while accompanying a friend to a family court in the middle of an unpleasant divorce case. It led to a rapid dash to the bathroom while desperately trying (and failing) to regain control -- not qui