R' Joel Rich: > IIRC the gemara mentions a case where 2 tannaim (amoraim) were sitting > together and one heard a voice telling him to return to the beit > medrash (where he became R"Y) and the other didn't. Taanis 21a, though it says that it was two Malachei HaShareis who were passing. Oh, and hello everyone, I'm back! :-) KT, MYG