Haha, he said "could of." Kind sir, I think the words you are looking for are "could" and "have." "Could of" does not make sense.
As my buddy Keith Olbermann would say, "Goodnight and good luck."
Olbermann's my buddy too, but he took that line from Edward R. Murrow. It's also five words, not four: "Good night, and good luck."
Not that this isn't completely off-topic or anything...