Board Thread:Fanon Canon 2/@comment-25152698-20140921035237/@comment-25152698-20140923130932

http://narutobase.net/manga/Naruto/590/6

Shock is also overrated, Itachi is definately surprised, but there are closer people to Itachi than Shisui.

Itachi never once tried to stop Shisui from taking his own life in the manga, yet he wouldn't allow anyone to harm sasuke. He also ahd his immediate family. If you can awaken the mangekyo by witnessing your best friend kill himself, then I think it's fair to say this application works.