I was enjoying a rare moment at the bow when we came upon a large gaggle of geese on the approach to Hertford. The noise when they took off was ... er, what's the auditory equivalent of "spectacular"? It was that. Noisy. Like the heron which waits for you to get almost close enough for a decent close-up photo, then flies on a hundred yards before doing it again, these geese took off, landed, took off ... being driven forward by our intrusion on their space.
Eventually most of them gave up, and took off for good. I don't remember them being here when we returned the next day.