i am sure i am not alone in the experience of both or all of your children crying/screaming at the same time.
bug has a this new thing she does when she is tired, if buddy cries and she is tired she will cry too. but not only will she cry she will scream and pitch a fit. here is a picture i took of both kids the other day when they were both having a melt down. i had to just laugh or i was going to go crazy.