Whenever someone's story is aborted, let the interruption play itself out. Give everyone time to dote on the little darling, give their dinner order, or pick up the jagged pieces of china. Then, when the group reassembles, simply say to the person who suffered story-interruptus, "Now please get back to your story." Or better yet, remember where they were and then ask, "So what happened after the . . ." (and fill in the last few words).
