As soon as Jimmy Fallon accepted Chicago Mayor Rahm Emanuel's challenge to jump in Lake Michigan to help raise money for the Special Olympics the social nets started talking.
Funny man Fallon tweeted the hashtag #swimmyfallon right from his desk at "The Tonight Show," and the chatter has been fun to watch. He asked his fans to wear a tie to the Polar Plunge to show their support.
Follow along below as we feature the best of the best on social media, and cover this charity event from a bird's eye perspective.
U.S. & World
Don't forget to post a selfie, especially if you're wearing a tie.