They also usually cannot fully turn their head to look in their blind spots or double check. They tend to ignore fail to assess potential risks, or if they do they are slow to react. Hence why most of the wrecks in my area are almost always caused by fatties. Any time I've come across aggressive drivers, people refusing to let you get over, making dangerous maneuvers, or speeding up to prevent a pedestrian from crossing the road when they have the right away...it's usually a fat driver.