We had 3, and yeah, that was Holmgren's intention. Denver had it on the 1 yard line, 2nd and goal. Somehow, Holmgren lost track of the down, and thought it was 1st down - which would mean that he could only stop the clock on 3 out of Denver's 4 downs, and also make it 33% more likely that they were going to score. So he judged it wiser to just let them score, and give Favre 1:45 to engineer a tying drive.
But actually, it was 2nd down, and even if they did punch it in on that series, Favre would have had a minute and a half or so to do his Favre-stuff.
It was a fitting mental error to end a generally poor effort on the part of the team and the coach. That one really hurt.