The pair can be seen passing a puck back and forth while skating around on the ice.
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"I've never seen someone ice skate or play hockey on the North Pond," said Ryan Silver, who took the video.
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With temperatures this weekend in the low to mid-30s, this fun activity can quickly become a tragic one if the ice gets too thin.
While the Chicago Fire Department said they have not responded to any water rescues, they ask people to stay off the ice.
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"Current water temperature is approx 36F. At that temp, if you fall in the water, loss of dexterity in your limbs happens in less than 3 minutes," the Chicago Police Marine Unit tweeted.
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They also reminded everyone there are several outdoor ice rinks in Chicago to practice slap shots and ice skating.