My problem is the definition for errant throw. It's sometimes taken for granted that we know of a definition. There is no definition in the Fed book or any other that I know of. Do I use "wandering" or "behaving wrongly"(from my copy of Merriam-Webster?) Or should I try "doing wrong" or "moving aimlessly" from the Random House dictionary on the desk?
It would simply take a clearly defined term in the appropriate section from the powers that be to help clarify things a lot.