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.