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add version of the elton john's "rocket man." >> you are known for being calm, cool, collected. tonight, you looked like you were having fun. >> yeah, that music is super fun and happy and exciting, and, so, that really helps me. >> i'm so happy for him! >> reporter: stephanee grosscup coached chen on and off for years, beginning when he was a toddler. >> he's living his dream. it's, like, 20 years now he's taken action on this dream he's had in his head. >> reporter: how great is that. the u.s. now has four gold medals thanks to chloe kim's second straight snowboarding victory. tonight team u.s.a. will go for even more when snowboarding legend shaun white takes his final turn on the half pike before retiring and hoping for a foamed. >> o'donnell: loved hearing from his coach, too. jamie, thank you so much. two months ago a deadly december tornado outbreak left a trail of destruction across eight states.