It's good to be undefeated.

Northwestern upended Duke, 19-10, Saturday to continue its hot start to the season. Expectations were not high for the 'Cats, but they are looking like a surprise Big Ten West team.

After the game, the team decided to take a fun dip in the cold tub:

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Northwestern was led by sophomore running back Justin Jackson, who had 120 yards on 35 carries. It was the team's seventh non-conference victory over a power five school since 2012, which actually leads the nation.

(h/t Twitter)