he hadnt lost in 7 years, he overreacted to the loss. once he had time to think about his legacy, dana probed him to go for the title. because the rematch will be the biggest money drawer in mma history.
and of course you have the, he lost on purpose so he could spend time with his family, but then they said no fight for the belt theory.
or the dana paid him to lose so the "superfights with jones or gsp" are off the table, or he paid him to lose so the rematch could draw huge numbers. idk
but weidman got him down once and silva got right back up, weidman got lucky and hit him when silva's legs werent under him. silva will dominate the rematch, especially cause he wont be acting cocky like that