Q. I try to concentrate intently on the meaning of “Y’hei Sh’mei Rabba etc.” as the Talmud appears to attach great importance to this endeavour, even going so far as to declaring that one who does so may be saved from an adverse decree in Heaven (Shabbos 119b).
Recently, I was in a synagogue where the Chazan was Speedy Gonzalez and before I finished the sentence he was already at “Da’amiron B’Olmo V’Imru Omein”. Am I supposed to interrupt my declaration of “Y’hei Sh’mei Rabba etc.” to answer Omein or not?

A. Horav Shlomo Miller’s Shlit’a opinion is that one should not interrupt the recitation of Yehei Shmei Rabba to answer another omein, including one that pertains to the same kaddish.

Rabbi A. Bartfeld as revised by Horav Shlomo Miller Shlit’a