See the track and links on
https://aviation-safety.net/database...?id=20170126-0
The box was reported as 1500m x 3000m ? This would have been ok for aircraft doing aero displays and flypasts, but this was a water landing, ie., a circuit or a straight in. He did a circuit. A box 1500m wide itself is just about his (105kias?) base turn diameter, if so then he would have been unable to line up inside the box in a normal circuit and it didn't look like he was flying a teardrop ?
Displays are a unique set of circumstances that need everything planned.