Why do you keep insisting Sasuke is to experienced to get surprised the sharigan. Rofl the sharigan only belongs to his deceased clan that was killed off by his brother. We already witnessed the drama he went through with that in part 1. Of course that would be one of the few things that would catch him off guard. How can Sasuke see the Uchiha crest of someone hiding in the bushes lol! Besides it's not like he didn't get surprised by Shins appearance because he did. Get over yourself.
There is nothing wrong with being surprise. There is a problem if a skilled and experience ninja lets that become his weakness. Naruto was surprise when Shin used the MS, but he didn't let that distract him.
