The Bewilderment of the Demon

After patiently waiting for an opportunity to arise, Iwao lets down his guard giving Akagi a chance to strike by calling a Tong, Chun, 1 Man and is looks to be in Ten Pai but will this bluff pass? Onto the 2nd sessions and Akagi goes into it without transfusing the 600cc of blood back into his body. What could he possibly be thinking?