«Rabbi Riskin has a great personal story about Davening as a 12 year old boy with the Klausenberger Rebbe in the Brooklyn in this week's Jewish Week:
(It's also in his book "Listening to G-d" pages 59-61.)
«...Then came the Torah reading. In accordance with the custom, the Torah reader began to chant the Tochacha in a whisper. And unexpectedly, almost inaudibly but unmistakably, the Yiddish word hecher ("louder") came from the direction of the lectern upon which the rebbe was leaning at the eastern wall of the shul.
The Torah reader stopped reading for a few moments; the congregants looked up from their Bibles in questioning and even mildly shocked silence. ...»