Jango went to bed I might be being overprotective but I am concerned that he is getting too much blood to the head from being upside down not sure its good for him to be in that position for 9+ hours?
I've seen mine sleep in the most uncomfortable looking positions. Usually my panther falls asleep normally on a branch, but sometimes he finds a skinny vertical branch to cling to for the night. Sometimes right-side-up, sometimes upside-down.
I always see my panther sleeping head down just like this. He has a giant cage (3'x3'x7') with a giant umbrella tree and large pathos and he still picks the weirdest sleeping positions.