Board Thread:Episode Discussions/@comment-1181222-20170816102343/@comment-734582-20170819090009

RexGodwin wrote: Also the manga failed to explain wtf that ugly little creature was... since its the same pale color as the Shins im guessing it was a failed deformed clone or something. Yea, it was a clone. The cave with all the weird Shin mutations proves as much. Crazylazyguy wrote: Fine, excuse me for using the word "trauma" instead of just "emotion". Well, they are different things.

Somewhat related: Sasuke awoke the Sharingan in response to the Uchiha massacre, against Haku he strained his eyesight and so the Sharingan properly manifested again. Obito awoke it in response to his strong emotions over Kakashi and Rin.