First, Play cutely and pretend like you are completely content with what you are doing.
Second, make a dash for the open door. When caught, pull funny entertaining faces in hopes of distracting those who might stop you from going outside and eating dirt and leaves to your hearts content.
Finally, when you think no one is watching again make more attempts at getting out the door which result in more photos. If you are lucky, you will actually make it outside for a few minutes unattended and can eat everything you get your hands on till someone discovers you.