The scanner is a good way of tracking what is about to happen but it can also give you an insight to what might not have gone to plan.  I heard a Robinson R66 call in for its approach.  When things are on a north flow, the helicopters will run along the river and turn in to land.  They can often come at quite a good angle for getting a shot. This one worked out well, despite the backlighting, and I was getting back in the shade as it touched down.  I then heard the tower ask if he was ready to take down the phone number he needed to call.  Oops!  I have no idea what the infraction may have been and I hope it all worked out okay.