"Hello, Professor McGonagall," said Moody calmly, bouncing the ferret still higher.

"What - what are you doing?" said Professor McGonagall, her eyes following the bouncing ferret's progress through the air.

"Teaching," said Moody.

"Teach - Moody, is that a student?" shrieked Professor McGonagall, the books spilling out of her arms.

"Yep," said Moody.

"Moody, we never use Transfiguration as a punishment!" said Professor McGonagall weakly.