Reply To: davening in public

If such a situation already arose, it is too late to ask a rav. Anyway, I don’t need to ask a rav, even if such a situation arose, because the halacha is clear that one may not speak during bentching. It is the same as SE. One may certainly not speak after having said the first six words of bentching, as doing so will involve two issurim of Sheim Hashem l’vatala. Likewise, one may not shake hands with some random lady at work, as ruled clearly by Rav Moshe Feinstein and the Chazon Ish. Therefore, what is one to do? I am awaiting Joseph’s brilliant response.