Well, the best thing that ever happened to me for public speaking was falling over the podium twice in the same talk. The audience forgave me and that cured my stage fright. Hell, you can't do worse than that!
So, the bell never bothered me. But my timing was always pretty good anyway. Brothers have a much easier time with talks than sisters becasue we aren't having a "conversation" and can make our notes in point form.
I find the TMS a real blessing and still prefer the TMS Guidebook to any other public speaking book. I am a good public speaker due to that course and especially due to that very humilating talk and the audience's loving non-reaction. Plus, the school overseers I had were very kind and competent.
Richard