Well, not exactly like the Hitchcock movie, but pretty close. There are 5 or so large black birds living in the office courtyard who have been acting crazy this week. If you stand too close to the window, one will swoop at the glass and make a really loud racket. I didn't capture any in motion - just got a quick photo of this one resting!
They are nesting and fiercely protecting their nests! Every spring birds crashed into my office windows, I don’t know how they kept from breaking their beaks!