We had a sparrowhawk fly into our kitchen window. It was stunned and lying on its back with its wings spread out - still breathing. The local feral cats were intrigued by it. My wife went out with gloves on and flipped it the right way up. After a period recovering, it eventually flew off.
On another occasion, I was in the front garden and a great tit landed right next to me. All of a sudden there was a whoosh and a sparrowhawk landed a foot away from my left foot at the location the great tit had just vacated. Immediately the hawk was off trying to catch the escapee, flying through a gap in the hedge. This time it was unsuccessful.