Board Thread:Naruto Discussions/@comment-26636534-20150903203142/@comment-23887466-20150905134131

@Nijiao, you should read the articles of the Substitution Technique and Amenotejikara. The Substitution Technique, is just a fast movement where you replace your body with something. Amenotejikara, is a space-time technique where the user swap places with anything in his range.

Tobirama and Minato used a similar technique against Obito, though in their case they used the Flying Thunder God to swap places. In Sasuke's case, he is able to swap himself with anything, even air, he is able to swap the place of other people as well.

In the Naruto verse, Space-Time Ninjutsu is of the highest level, when Kakashi saw Tobi using Kamui to teleport, he was surprised of how Tobi was able to teleport without seals. And Sasuke is even faster than both of them, as he doesn't need any seals.