This is Kali, Knoxville Zoo's resident White Tiger. Kali, in general, is very shy and doesn't come out much. She's been more than friendly to my girlfriend and I after an incident we had at the Zoo.
See, Kali hates camera flash, and there are signs all around indicating that. A few weeks back, we were at the Zoo and this very unintelligent woman thought it would be smart to ignore the signs and use her flash regardless. Kali walked straight toward the lady, lunged at the fence, and roared so loud that it literally shook our insides. We confronted the woman and took up for Kali. Once the woman left, Kali came back over to the fence and brushed her face up against it and purred. It was almost like she was saying, "thank you!"
The next weekend, when we went back, this video was taken... we think she remembered us!