 Gendo Ikaris muted final words to Ritsuko were never scripted.  There was originally meant to be an explosion in the background  making the line inaudible, but even after it was cut Anno still  wanted the line to be unheard. Yuriko Yamaguchi (voice of Ritsuko  Akagi) had difficulty delivering the subsequent line "Liar" without  knowing what Gendo had said. Anno gave her one small hint as to what  the line was, and she instantly knew exactly how to delivery the  line. To this day, only Anno and Yamaguchi know what that hint was.