Jump to Frame in the end after playing

[5TonsOfFlax]

var dynRoot:MovieClip = MovieClip(root);
dynRoot.about.addEventListener(MouseEvent.CLICK, _click);

function _click(event:MouseEvent):void{
  dynRoot.afterGo = "about";
  gotoAndPlay("go");
}

Then in the frame where you want to jump at the end of the "go" section:

var dynRoot:MovieClip = MovieClip(root);
gotoAndStop(dynRoot.afterGo);

The reason we need to set a property on the root object rather than just a variable is that a variable would be local to the frame it's on and would fall out of scope after that frame was over.