Parshas Mishpatim - A Bone To Pick

Parshas Hashavua ורפא ירפא The מהריל said that all רפואות and לחשים mentioned in Shas are forbidden to be practiced. It only works under certain conditions.  Someone who will try it and if it won’t work might Ch"v ridicule Chazal. There is one exception, and that is if someone has a (fish) bone stuck in his throat. The Gemoro ( Shabbos 67a) says that he should bring another bone and place it on the back of his head and say" חד חד נחית בלע בלע נחית חד חד" This לחש is allowed because it is בדוק ומנוסה (guaranteed) to work in all conditions."  I once heard that this לחש only works if you use the Sefardic Havarah (accent). The ח Ches and the ע Ayin (from chad, nochis and bola) are pronounced from deep inside the throat. Pronouncing these two letters (Sefardi accent) manipulates the throat so that the bone will dislodge