Dragon Ball Kai • S01E92 : The Tears that Disappeared into the Sky! The Angry Super Awakening of Gohan
Gohan's reluctance reaches it's limit, and #16 asks Mr Satan to carry him over to Gohan to talk to him. #16 explains to Gohan what to fight for, and that it is okay to unleash his anger to save those that he loves. After hearing his words of encouragement, Cell takes his foot and crushes #16's head. Seeing this is ultimately the last straw for Gohan, who finally releases his rage and ascends to the Super Saiyan 2 level. Gohan then turns his attention to the Cell Jr.s, taking them out one-by-one.