I seem to have an incorrect memory of the "person" who always opened his shiur with a "Joke" in order to relieve the tension and to somewhat "relax" his talmidim for I thought this was Rebbi himself.
Can you please correct my error and tell me which Tanna or Amora it was and the daf reference.
Noach miTelshestone, Israel
I believe it was Rabah ("Heh" at the end) - see Shabbos 30b.
Best regards, Reb Noach!