I also love this play. It is actually called a choice route for the IB. If the mike lb is absent, the IB goes through teh fake handoff and goes about 5 yards or so deep and turns around and sits for the pass. If the mike is present, then instead of sitting 5 yards deep, he goes through the fake hand off and goes 5 yards down teh middle, then breaks to the outside. Often times there will be a slot receiver or TE on the same side clearing the olb from the play. I don't think it's always suppose to be a screen. Since it is play-action, you will see some penetration from the front 4 because they think it is run.