Physically speaking, he has unbelievable balance. He always forward after getting hit, and the reason is because he can feel which way the defender is attacking his body, and has the ability to adjust in an opposing way that allows him to still make forward progress. It's an art form, and it is so much fun to walk. Besides that, he plays with a low pad level, and has good acceleration going into the hole so he is already full speed or close to it.
But his greatest attribute, in my opinion, is his heart for football, and his unyielding effort.