in to kill a mockingbird Scout has two reasons for wanting to quit Jem and Dill's Radley game. What are they?

At the end of chapter 4 Scout says there were two reasons she wanted to quit playing the "Radley game." One was because Atticus showed up and caught them. Jem doesn't think that Atticus knew what they were doing, but in chapter 5 we find out that Atticus did know.