As an experienced family law practitioner, you have seen this happen and your reaction is somewhere between the slumped shoulders of disappointment and the desk pounding and screams of anger. You have just gotten your client a favorable result in a custody trial and the opposition immediately files a modification, re-starting the entire process. If you are lucky, you will have a day or two to enjoy your victory before you receive the modification petition. Sometimes you do not even get those two days.