As a commentator you have a tough job. Relate what's happening in front of you to the watching audience, without being irrelevant, and be suitably excited at the right moments. Just don't make a mistake.
So when a stunning shot from Cardiff's Gunnarsson ripples the back of the net that would seem the right time to cue hysteria from the commentator right? Wrong apparently, because Gunnarsson's shot hit net at the back of the goal after going wide - completely fooling the commentator to amusing results.