I remember years ago stood on top of the "cliffs" (about 30 - 40 ft. high!) at West Runton in Norfolk, when a Bucc. came along, following the coastline.
The coastline at our standpoint was a gradual curve, and as the Bucc. approached from our right, it slowly banked to the left to follow the shore, until it passed us, vertically banked, no more than about 100 ft. from the cliff edge.
We could easily see the driver and looker, as we were looking straight down into the office.
I don't know how fast it was travelling, but the noise and the blast reached us a split second after it passed.
It was utterly amazing. The noise, the rush of air, and it was gone!
What an experience. It was truly awesome.