Otis has spent the last hour climbing upside down on the roof of his cage attacking all the toys hanging down. Opie has been following him around either hopping from perch to perch or climbing the sides of the cage but staying out of reach. And they've been making enough racket to wake the dead.
Otis is even hanging on to the bars on the top of the cage with his beak and using his feet to "run" across the top of the cage upside down. He loves to be upside down. I think he's half bat.