There are hidden Easter Eggs located all over Walt Disney World. One you may miss is found when you are exiting Avatar Flight of Passage. In the corridor on the lowest level, you may see three handprints in red paint.
These are the handprints and initials of James Cameron, the director of the Avatar film, Jon Landau, producer of Avatar, and Joe Rohde, lead Imagineer for Pandora and all of Animal Kingdom. This was their way of leaving their mark on Pandora: The World of Avatar after working so hard on it for all those years.