Top 5 videos: Surprising Olympic victories

1. After Team USA's Sage Kotsenberg became the first Olympic snowboarding slopestyle gold medalist, thousands rushed to his Wikipedia page to answer: Who is this guy? The 20-year-old from Park City, Utah, beat out top competitors Max Parrot and Mark McMorris of Canada in a massive upset.

2. Four years ago, Alex Deibold was waxing snowboards in Vancouver for the U.S. snowboard cross team. Now, he’s an Olympic bronze medalist and one of Sochi’s wildest success stories. On a foggy, soggy course at Rosa Khutor Extreme Park, the 27-year-old from Vermont outlasted crashes and falls to secure third place in a photo finish.

3. Austrian Matthias Mayer shocked the Alpine world by upstaging pre-race favorites and scoring the gold in men's downhill. The 23-year-old had never before finished first (or second or third, for that matter) in a World Cup or world championship race.

 4. In a rare Alpine skiing tie, Tina Maze of Slovenia (who also happens to be a pop star) and Dominique Gisin of Switzerland both won Olympic gold in the women's downhill. It was the first gold medal tie in the event's history. The pair’s time: 1 minute, 41.57 seconds.

 5. Meryl Davis and Charlie White won the United States' first-ever gold medal in ice dance -- an event traditionally dominated by Russia. The pair, both Michigan natives, set a world record with their 116.63 score in the free dance.