As a child hanging out and occasionally helping out in our little Blue Ridge weekly newspaper, The Floyd Press (formerly The Mountain Boomer...named after a squirrel!) where my Daddy was the Editor & Publisher and my Grandmother set the type, I heard "Pi" more than once when a somebody dropped a form. It was cussing, as far as we knew...and we'd lay low while somebody would read the type backwards and figure out where it fit again.