Bah, the gaiden was one of the most mature chapters thus far stictly because they didn't feel compelled to show Kakashi fighting hordes of Rock jounin and the like.

Assertn's idea is a good one though. They should have showed Kakashi chidori'ing that dude's head. Oh man... right IN THE HEAD. They could have showed his brain popping out. And then Kakashi would totally rip his spine out and use it as a whip to beat the rock jounin.

Rin is a girl so she just watches.