I was reading a major novel from a major genre publisher last night (okay, it was Half the Blood of Brooklyn by Charlie Huston, from Del Rey), when a character suddenly "knocked" an arrow into his bowstring.

Not to knock the book's copy editor, but the nock is the notch at the end of the arrow into which the bowstring fits. When you slide the arrow into place against the string, you have nocked it.

But this was also a book where "puss" leaks from one character's eyes, so maybe I shouldn't snatch at hopes that the copy-editing will improve.