Yes I know that the sandball is hard as hell. After all all of Sasuke's other puches were deflected and his knuckles even started bleeding. So I know.

The Chidori wasn't like dramatic. Atleast to me.
I did mention that it was QUITE IMPRESSIVE from Gaara to withstand the power of chidori.

It's a cool techicue when done by Kakashi. Not Sasuke.