Danish stand-up comedian Nikolaj Wulff ( shared this photo of his pet guinea pig getting REALLY excited about finding a piece of carrot. I have the same expression when I run across a slice of cake. Carrot cake, of course. Via I Can Has Cheezburger?
Although this turtle looks like he's smiling and happy about the toothbrush cleaning. We have had our turtle for over 8 years and he hates the toothbrush! That turtle is trying to bite that guys finger.