A loud thump above me, the window pulses and I sit up alert, expecting a rain of shattering glass. The window doesn’t break, there’s another thump and the window shudders again. I jump and look up. There’s a pigeon flying around inside, bumping up against the glass, trying to get out. A sprinkling of dust and feathers falls around me. The panicked pigeon reels away and tries to fly through a window across the room. It manages to get itself cornered, flapping nervously behind the propped-open door. One brave soul walks purposely over and reaches for the bird. It flaps wildly, feathers fly loose. He achieves a firm two-handed grasp on the bird and carries it outside to a round of applause.