In their defense, they are rendering a salute. Therefore, if that airplane took a hard right 90 degree turn and then continued taxiing forward for 69 seconds and had break failure, each person would only have a few precious minutes to make personal decision between breaking rank and running for their life or dying via Indiana Jones method. Because nobody died immediately after, we can safely say that less that $30 of reflective technology saved 12+ lives on the ground, an aircrew and several million dollars in Air Force Assets.