Mom, I'm a cheetah!
Of course, I hear it like he said it, "I'm a shee-tah," as he runs into the room and slides to a stop in front of me, which is why it cracks me up. I don't even remember why he didn't have any clothes on. He was drawing on the window with dry erase markers, and decided to draw on himself as well.
And, seriously, look at that smile.