Heron avoids getting trapped by shore line

While visiting Ally and Ben on Jubilee recently I noticed the local heron calmly walking along the jetty, as casually as if it were just checking up on the boats moored there. While I was fiddling with my camera, creeping outside and getting a mediocre shot, Ally grabbed her iPhone and snapped this much better one through the window.

Moments later the heron stopped at the edge and peered intently into the water. (My photo now.)

In a flash its neck unfolded and its head jabbed into the water, its body stretching behind it. But it got caught in the blue mains cable you can see looping between the pillar and the boat. There was a moment of struggle, a thrashing of water, and then - phew - the bird was free. And it had got its fish, which slipped down its long neck in two or three gulps.