Barney responds, of course, by leaving!
Here are a few more pictures from the outside camera.
Fluffy emerges like the cork from a bottle some time later.
This is Barney leaving the box after another (successful!) wait for Fluffy.
This is Fluffy doing her cannonball trick a short while later!
This is Barney. He is doing a vertical take off from the nest box hole in order to land on the roof directly above.