Spunky Eye
The look a guinea pig gives, when it's completely still, staring at you wide-eyed from the side of it's head. When a human looks at you suspiciously, cautiously, or in a silly gaze playfully.
I was playing with my guinea pig, when things got weird and I was doing something that startled him. He completely stopped moving, and looked at me with one eye, open wide, completely uncertain as to what I was going to do next. He was giving me the Spunky Eye!