2 versions of a story

The first is from R' Rakeffet:
We'll close with a story which was also told in Rav Lichtenstein's hesped for the Rav. In the summer of 1969,shortly after Tonya died, his talmidim went to study with him sothat he shouldn't be alone, including R' Menachem Genack. TheRav said, "How can I give you some emotions?" He started toteach from the Likutey Torah of the Alter Rebbe. Genack asked,what do we need from the Lubavitchers? The Rav told him a story:my great-grandfather had a chasidic relative, who asked why washe so anti-chasidic? Come to a tish, and see for yourself. Therebbe talked, and as he talked, the ground outside (in the middleof winter) bloomed as if it were spring. The Beit Halevy noticedit was getting late, and said "vu darft men davenen mincha" [wehave to daven mincha]. The world collapsed back to normal.Genack, you are like my great-grandfather.

The second is from a Lubavich blog (and was posted in the comments to the next post)
Rav Soloveitchik of Boston would give a Shiur in Likutei Torah, the Ma'mar Ani L'dodi, during the month of Elul while vacationing in the country in Massachussets. I don't remember whether it was Cape Cod or Martha's Vineyard. This shiur became more intense as time went on, and it took more of the time from the Shiurim in Nigleh. There was one Talmid who was irked by the fact that the Rav was so excited by a Chassidishe Sefer, especially at the expense of "real" learning. One day he spoke up and voiced his concern to the Rav. "Why are we wasting our time with this, wouldn't it be better if we stuck to the learning of Gemoroh Taysfes?The Rav regaled them with the story by Yiddish writer --------------- of the Simchas Teyreh spent together by the Brisker Rov and the Bialer Rebbe, (characters may be different) where the joy of the congregation and townspeople reached the heavens. The dancing and merrymaking continued very late into the day, with nobody paying attention to the clock. Late in the afternoon the Brisker Rov began to get nervous about Mincha, but the dancing and singing would not subside. When he could not wait any longer he jumped out of his seat, banged on the Bimah, and yelled "MINCHA!" which immediately caused the dancing to halt.The Bialer Rebbe was quite unimpressed with this outburst, albeit for a good and just cause. He was to say: "Az Yidden Tantzen un Freien Zich Tzuzamen, un es kumt einer, takeh mit recht, un shtelt es op, iz dos Choshech!" The "Rav" turned to Menachem Genack and said to him: We sit here and learn this Maymer, and we bask in the glow of the light of Toras HaChassidus and you come and try to stop it. Du, Genack, Du bist der Cheyshekh!