He jumped a bit, quill making a splotch where the Quaffle was meant to be, and looked up with a scowl to find the source of this particular muck up. It was bad enough with students dropping things, but it echoed in the Great Hall, amplifying the sound as if she'd slammed the camera on the table in front of him.
"Oi," he called over, "Trying to wake the dead over there?"