Okay, so not a tiger. It's Penelope's serious stare of determination!
I swear she had this look a few days ago. I was crouched down taking pictures of Diesel. All of a sudden something struck me from behind, knocked me over. Penelope rolled over the top of me. She has a tendency to fling her entire body at Diesel. I guess she thought she would try it with me! Of course she had been playing in the water beforehand so my backside was soaked.
Lesson learned: Don't forget about the puppy in the yard when squatting down to take pictures!