I’m guessing the pilot saw the end of the runway approaching and chose the softer surface as the way to bring his craft to a halt...inside the confines of the airport and not beyond the perimeter fencing.
The runway the pilot was landing on Rwy 13C, is equipped with Engineered Material Arrestor Systems (EMAS). If you look closely at the picture you can see this system off the right wing of the aircraft. It looks like a short stack of squared material. It is designed to stop an aircraft that goes off the end of the runway. Go to youtube and search on EMAS for video on how the system works.