How was Obito able to use Kamui immediately after awakening his MS?


In Episode 435 of _Naruto Shippuden_ , Obito awakens his Mangekyo Sharingan
and attacks the hidden mist ninja using the MS ability. However, he had no
prior knowledge about the MS as Madara never explained it to him at this
point.

So, how did Obito know about the Kamui Dimension after he suddenly awakened
his MS? Madara never said that it can be a MS ability, nor Zetsu told him
anything. Also, Kakashi figured about the Kamui much later. How did Obito
figure out how to use the ability without training?




During the fight against the Hidden Mist ninja after Rin's death, he never
teleports his entire body to the Kamui dimension. **His intangibility ability
is probably activated involuntarily** (he never got attacked unless he
purposely made himself tangible, like the fight against Minato). Kakashi
doesn't have intangibility, so he wouldn't know how his MS worked until he
figures out how to use Kamui.




During the fight against the Hidden Mist ninja after Rin's death, he never
teleports his entire body to the Kamui dimension. **His intangibility ability
is probably activated involuntarily** (he never got attacked unless he
purposely made himself tangible, like the fight against Minato). Kakashi
doesn't have intangibility, so he wouldn't know how his MS worked until he
figures out how to use Kamui.

