Let's Talk Movies in the park (when good guys go bad)

Let's get together in Broad Ripple Park to share our love of movies.
Our first round will be about movies that we have seen recently. Come prepared to share about a movie that you have recently seen (in a theater, at home, anywhere else). Give us a short plot teaser (no spoilers!) and your reactions to the movie. Please join in the conversation about other members' movies.
Our second round will be about movies where an actor known for playing good guys turns bad. What are your favorite examples of this? What does it take for this turn to be particularly effective?
There will be no Movie of the Month during August. Feel free to watch a new to you example of this heel turn. Road to Perdition is showing on Kanopy. It seems that Collateral and Once Upon a Time in the West are also streaming on Kanopy. (Kanopy is a streaming service free to most library card holders).
We will gather at the Picnic Knoll, a set of picnic tables just to the right of the playground on the edge of the main parking lot. In case of light rain, we will move to a nearby shelter. Please check for comments if the weather is dicey.