Greetings ladies and gentlemen! I'm forest ranger Bob, and my job here is to ensure that you all have a wonderful time here at Yellowstone National Park. We generally try to keep the park as safe for tourists as we can, while also maintaining a clean park for its natural residents. With that in mind we have a few rules that we would all greatly appreciate you following. Thank-you in advance for your cooperation: Rule Number Seven Always have an extra rule in case one of the others break, get lost or are stolen.