With a pair of juvenile Eagle of course. A friend of mine and I saw a pair of juvenile Bald eagles sitting on a tree when suddenly a Common Raven flew in to land on a branch just above one of the Eagles. It then proceeded to hang up side down, swaying back and forth, flapping its wings as if it wanted to play with the Eagle. All the while the other Eagle looked at the Raven's antics with amusement. After a while the Raven left when it couldn't convince either of the Eagles to play. All of this may sound like a little presumptuous; however, I did some reading about games that the birds play. There are only 25 species of birds, out of more than 10,000, that actively involved in a game play. Crows, Ravens, Magpies are some of these fun loving birds. One of the game they play is going upside down just as this raven did. They have apparently seven different games in their repertoire. It was a great fun to watch this unfolding.
