Rabbi Yochanan stating that Eliyahu will have to come to explain a certain part of the Torah: Menachot 45a [2x]
Rabbi Yochanan reporting that in his youth he had responded to a problem which he had put to the Elders, and it had turned out that he was correct: Megillah 5b-6a
How he began his teaching of the Purim Story: Megillah 11a
Rabbi Yochanan said, "The early ones [a reference to Rabbi Akiva or Rabbi Elazar ben Shamua] had hearts like the entrance to the Temple's large hall, and the later ones [a reference to Rabbi Elazar ben Shamua or Rabbi Oshia Berebi (Berebi=leader of his generation)] like the entrance to the Temple's smaller hall, and ours are like the eye of a clothes-needle." Abbaye added, "Our ability to understand is like that of a peg jammed into a small hole in a wall." Rava added, "Our minds' ability to understand is like a finger stabbing into thick wax." Rav Ashi added, "We forget as easily as a finger fits into a cistern's entrance.": Eruvin 53a
Rabbi Yochanan was so strong that when a ladder's rung broke beneath him, he was able to hold up with one hand Rav Ami and Rav Asi who had been supporting him, and to use his free hand to climb a pillar. He only wanted the supporters in order to conserve strength for his old age: Ketuvot 62a