If your child seems really stressed lately and you're not sure if it's a temporary thing or something much more serious, consider this free supportive event.
Perhaps part of it was realizing that whenever I walked outside, the chance that I would be confronted by a hungry zombie mob was generally a small one.
One of the best ways to avoid getting stuck in our thoughts is to get out into the physical world. Call a friend. Have coffee with your brother. Go to the gym.