The Rashi Announcement That Wasn't
As I Heard Them, Vol. 1, p. 453, no. 56 · Rebbetzin Chana Schneerson
Continued from the biography of R. Zalman Duchman:
After the passing of his mother, Rebbetzin Chana, the Rebbe began saying sichos on a Rashi of the parsha at the farbrengen . The Rebbe would notify R. Zalman of the chosen Rashi, and R. Zalman would announce it before davening, so that people could review the Rashi before the farbrengen.
On one occasion, a young bochur tried to play a trick on R. Zalman. On an ordinary Shabbos, when no farbrengen was planned, he told R. Zalman that there would be a farbrengen and specified a certain Rashi that the Rebbe would discuss. R. Zalman, in his innocence, trusted the bochur and made the announcement. The Rebbe looked at him in wonderment, and no farbrengen took place.
R. Zalman felt terrible about what had happened, and he penned a long letter of apology to the Rebbe. The Rebbe assured R. Zalman that it wasn’t his fault, and that it was meant to be b’hashgacha pratis. At the farbrengen of the following Shabbos, the Rebbe discussed the incident, and even offered an explanation on the Rashi that R. Zalman had announced.