At the start of Episode 2, you'll be tasked with finding a memento. The pile Teddy brought in will have none, but Amanda will be playing with a baseball. She'll only relinquish it if you shove her, starting the scene.
You get a Perfect for doing a move quickly, followed by Great, Good, Poor, and Miss. Given the limited amount of actions, you need to get mostly Perfect. I find Kinect to be far easier, as the inputs are much simpler. Reading the incoming moves at the bottom of the screen is the most important aspect, especially if you're trying to do it the first time around. Orange icons involve your right side, blue involves left, a body icon is a special stunt. Finishing without a single stunt at Poor or below will award a separate achievement, while simply finishing gives an unmissable achievement.
I had difficulty with the final stunt, reaching out and grabbing the ball. Outstretch and grab upwards to get it in the end. If you fail this stunt, David goes out the window and loses all his life for a game over.