I must post on this one... Anyone else notice the eye "transaction" between Itachi and Shisui? How relatively simple it seemed? Itachi's face is like "Come on man... There has to be another way..."
Based on what was written though, I'm guessing that Shisu had absolutely no nerves left in dat eye of his, or just was very immune to eye pain. X.X
One minute he talking, the next, he got his eye in his hand. No grunt, no yell, no quiet "ow", just more speech after that. I don't know what to call that, insanity or tolerance.