Red Gerard does much of his training in a facility built by him and his older brothers in their back garden: Getty Images
Teenager Red Gerard snatched a dramatic victory in the men's slopestyle to win the United States' first gold of the Pyeongchang Winter Olympics.
The 17-year-old scored 87.16 on his final run to beat Canadians Max Parrot (86.00) and Mark McMorris (85.20).
"I cannot believe what has just happened - it is insane," said Gerard, reports BBC.
Austrian David Gleirscher was the surprise winner of the men's luge and Norway's Simen Hegstad Kruger won the men's skiathlon despite an early fall.
Elsewhere, Dutch speed skater Sven Kramer took a third consecutive gold medal in the 5,000m, German biathlete Arnd Peiffer was a surprise winner of the 10km sprint while 19-year-old French skier Perrine Laffont triumphed in the women's moguls.
The blustery weather meant the women's slopestyle and men's downhill skiing had to be rescheduled.