The anaconda vise is not just "a submission hold that Punk uses a lot", as H33LTurn claims; it is his SECONDARY/SUBMISSION FINISHER. He used it a lot on opponents last year during his feud with Big Show, proving that he had a way of finishing him off without having to get him up for the GTS. Before the GTS became his primary finisher, the anaconda vise was his ONLY finisher. They needed to sell it as a critical spot in the match, just like the STF that Punk broke out of prior to applying it.
As NthDegree23 pointed out at the top of the page, on Raw, during the first match of his previous feud with Cena, Punk applied a koji clutch, to which Cole responded to by shouting "ANACONDA VISE! ANACONDA VISE!" He didn't stop there, though. He went on to sell it as, "If you haven't seen it yet, Punk has ended several matches with this hold!" At least it was an attempt to put the move over, but he was putting over the wrong move, which just confuses people if they've seen the anaconda vise before and don't remember him using the koji clutch.
I think that the most egregious instance of failure to put the anaconda vise over was when Punk came out on Smackdown, dressed as Jeff Hardy and cutting a heel promo on how he changed the landscape of WWE by retiring Jeff Hardy and was able to do it because he's Straight Edge and therefore better. He explained that he didn't smoke, drink or do drugs, but had "one VICE", which was an anaconda. Brilliant pun, nice segue. Todd Grisham says, "I wonder what he meant by that."
Not to stray too far off topic, but as an example of bad commentary and inability to call moves correctly, I alternate between thinking Grisham is passable or one of the worst. I watched Gabriel vs. Kidd from NXT because I had heard it was awesome (I don't watch NXT otherwise), and there was a spot where Grisham doesn't know what to call a plancha. Regal calls it a plancha, with an English accent (next word beginning with a vowel, sometimes a soft "R" sound in between), and Grisham refers to it as a "plancher". I mean, come on, really?
There was a time when I didn't like Matt Striker. I thought his heel commentary was a bit forced at times, particularly when putting Punk over, actually. I cannot even begin to describe how much I miss the shit out of that man and his presence behind the desk.