Birk Ruud of Norway has become the first Olympic champion in the men’s freestyle big air, taking gold at the Beijing Winter Games on Wednesday. The 21-year-old earned the highest score of 95.75 on his first run at the new Big Air Shougang venue. His two best scores put him top of the standings on 187.75. Ruud had already won a test event in Zhangjiakou in 2019, and won back-to-back big air overall World cup titles in 2020 and 2021. He said he had dreamed of Olympic gold since he was a young teenager. “I just had to focus on my skiing and put down those tricks. I am really proud of myself that …