I was in a wedding party once, and the priest informed the non-Catholics to bow our heads while we all knelt at the alter, and not eat of the wafers as they were being passed.
My head must not have been down far enough, because he inadvertently put a wafer in my mouth.
Since I wasn't expecting it, I choked and sputtered.
"Don't worry," the smiling priest whispered, "it won't kill you."
And he was right.