Planet 51

In the suburbs shortly into the game you will encounter “Chuck” the astronaut who accidently landed on “Lem’s” Planet. The POLICE are “Chucks” so called enemies. In fact as soon as you control “Chuck” for the first time, it will teach you about trash cans and how to hide in them. After finishing that mini tutorial, you will be at street level right near another trash can. Simply sit and wait for a police car to drive by, which is VERY frequent and look for the GREEN arrow above the trash can to start pointing at it. At this point you can enter the trash can by pressing the “Y button” and hide from the police. Rinse and repeat this method here and you will have the achievement in about twenty to thirty minutes.