My oldest male panther, female carpet and 2 female panthers all seem to "know me" (as mentioned before by some one else) along with my boyfriend and certain other that are often over. It is even more obvious when a new person comes over or I am holding them around others. I've always felt my oldest male panther is not only incredibly intelligent (at least smarter then what I believe chams are typically made out to be), but knows where I keep certain things in the room like the mister bottle, the super worm bin, and goliath worm cups. When out having "free range time", he'll race directly to one of those areas. When I use the mister bottle (in addition to my misting system) he'll put his mouth directly on the nosil. I think chams have an excellent memory, at least of basic essentials / things they like. It would explain alot of my chams' behavior and others i've met in person.