Protect Chewbacca
So as we mentioned earlier, Chewbacca was a creature that was developed by the Star Wars team and resembled a bear or even the mythical beast Bigfoot. This caused some problems when the team was filming in the forest of Northern California, where hunters were roaming around with real, loaded guns.
Of course, the hunters were not looking for Chewbacca to shoot and kill, but they could have easily mistaken the actor inside the costume for an animal. So a lot of bodyguards in bright yellow suits were around Chewbacca at all times to look for hunters and warn them that they were shooting a picture and not to shoot.