Mona jumped a foot in the air at the crash outside the corridor, upsetting an ink bottle and splattering Color-Change ink all over her face.

"What in Merlin's-" she cried out, running to the exit. There stood a stranger about the size of a lamppost, crouched over an unholy mess spilling out of a box on its side.

"Who," Mona barked, "are you?" The ink on her face changed from blue to green, like a flashing neon sign.