Christos' Ambition
Joker's projection had a serious expression, however Sam who was controlling the projection saw the scene through the eyes of the projection had an expression of amusement.
He almost wanted to laugh out loud.
Christos, the big and noble Christos that could care less about half of the instructors in the Zeus Academy, is bowing down. However, Sam is not stupid enough to believe that this guy really did this in good conscience.
He is a selfish, arrogant, cunning and deceptive guy who will sell his own wife out if he could gain enough benefits, there is no way he will just bow down to Joker out of pure respect.
In his words, he is just acting shameless. He just wanted to fleece Joker clean and gain as much as possible.