G, They don't snap out of it...they have to work through the entire process in order to come out the other end of the crisis, hopefully a better and more solid individual.
There have been times when a person or something can interrupt their crisis for a period of time. However, when this occurs, their crisis will be far worse than it was before being interrupted.
Keep in mind, they become the mirror image of themselves...whatever they were like pre-crisis, they will be the exact opposite. Oh, btw, they are operating on pure emotional energy and they do not think rationally. So, please do not try to rationalize w/them...you won't win.
Try to focus on yourself and your family. It's difficult when they first hop on the Mother Ship, but you will find a way to turn the focus back on to you.
Sit quietly, the answers will reveal themselves when you least expect them to. The past is gone, the present is a gift and you need to focus on today, allow the future to reveal itself when it is ready.