Rebbe and a person who claimed his wife had falsely declared herself a virgin, where she was undernourished: Ketuvot 10b
Whether the law is like Rebbe against an individual who opposes him, and against multiple sages who oppose him: Eruvin 46b; Pesachim 27a; Ketuvot 21a, 51a
Overriding the rule of following Rebbe's legal positions, because of a ruling by Rava: Ketuvot 51a
Adding a prayer to Amidah for protection from danger; this prayer has been incorporated into our davening, in the beginning of the verses of the Offerings: Berachot 16b
Examining menstrual blood at night, by candlelight: Niddah 20b
Examining the same menstrual blood at different times of day, and coming to different conclusions, leading to recrimination: Niddah 20b
Rebbe said he learned a lot from his teachers, more from his peers, and most from his students: Makkot 10a
Rebbe's refusal to permit or forbid transport in an alley which bordered on the sea and on a garbage heap, lest the heap be removed or the sea deposit sufficient silt to create land: Eruvin 8a, 99b
Rebbe enacted a law that the people of Geder could visit Chamtan, but not the reverse, on Shabbat, because the people of Chamtan would kill Gederites who visited them in Chamtan, where they felt powerful: Eruvin 61a
Rabbi Chanina's report of how Rebbe stored his phylacteries [tefillin]: Berachot 24a