I think we can all agree that this is one trend which needs to die. No one is interested in what boxers you are wearing. If this is being done for the better ventilation and airflow, then try wearing shorts.
Is it normal that I maybe got a half chub from this video? I bet I could compete in a race such as this with my mom's mini-van. I heard if you put jet fuel in the tank instead of unleaded; it works wonders.