Kuhn got a first down on that play.
Just for the record — it was a successful play. Lots of style, but the Packers won that round.
You must be thinking of a different play. It was a 4-yard pass on 1st & 10 with 3:44 remaining in the 4th quarter. The series ended in a turnover on downs.
http://www.pro-football-reference.com/boxscores/201601160crd.htm#pbp
...dbs