This is interesting and I think you can heal past traumas with a variation of this.

So, if you remember a haunting event that you think may impact you even today, but then play it out how you want it to (ie vividly re-imagine as you would have liked it to be, or where you respond as you would now) then your present mental processing can be released from the malingering effects of the trauma.

This is the most powerful technique for mental healing I know.