This is one of the first pictures I took of a flock of migratory waders that I 'discovered' one evening at East Point. They'd assembled (in their hundreds if not thousands) on a rocky outcrop that was about the last available space left by a huge high tide. I wasn't expecting to see so many birds so close and didn't have my camera set up the right way. When they saw me, they all took off at once and I snapped off a few shots. I quickly checked the photos on the back of the camera. When i saw the blurry mess, i nearly dumped them straight away, but the flock looked like it was coming back so I concentrated on taking more pictures.
It's so often the case for me that the best part of picture-taking is when I first see the results up on the computer screen. When I first saw this one I was blown away. The combination of a shutter speed that's too slow and my moving the camera to follow the ascending birds somehow captures the sense of motion. And somehow, in amongst the blur, the wings of some of the birds are quite sharp.
I got a similar sort of shot a few days later. Some magpie geese had congregated in a field near my home and I got this when they were disturbed by a hawk. Less of an accident, but I wasn't expecting the ghoulish figures flying across the scene. (You can see some of the geese quite clearly at the left.)