Scarlett Johansson took to the streets in a pair of bright pink Vibram FiveFingers during a run with beau Sean Penn and friend Owen Wilson. The threesome made their way through a Los Angeles neighborhood together, and Scarlett demonstrated that like Reese Witherspoon, she is a midfoot striker. Striking the ground with your midfoot provides greater shock absorption than heel striking, and it puts less strain on your calf muscle and Achilles tendon. One of the benefits of running barefoot or with a minimalist running shoe is that it encourages you to improve your gait and posture. Looks like it might be working for Scarlett!