While visiting the home of Yanky Stern in Lakewood as part of the Keren Olam HaTorah delegation touring America, Harav Chaim Mordechai Ausband, Rosh Yeshiva of Ateres Shlomo, directed a bochur with a difficult question to Harav Yisroel Bunim Schreiber, Rosh Yeshiva of Yeshivas Nesiv Hadaas.

The question required finding every machlokes between Rabbah and Rav Yosef throughout the entire Mesechta Bava Basra. Watch as Harav Schreiber mentally reviews the entire masechta from memory, astonishing everyone present with his incredible bekius and mastery of Torah.