Models wear creations as part of the Manish Arora ready to wear Fall-Winter 2019-2020 collection, that was presented in Paris, Thursday, February 28, 2019. (Photo by Christophe Ena/AP Photo)

Models backstage ahead of the Etam Winter 2019/Summer 2020 show as part of Paris Fashion Week At Roland Garros on September 24, 2019 in Paris, France. (Photo by Rex Features/Shutterstock/SIPA Press)

George R.R. Martin, Lena Headey, Sophie Turner, and other cast and crew of Game of Thrones have faced the winds of winter – or anyway, a bucket of ice water – with the popular charity challenge. HBO’s Game of Thrones gives fans chills in every episode. But as the Ice Bucket Challenge for ALS research has exploded across the internet, the cast and crew of the shocking show gave themselves goosebumps as they stepped up to get soaked.

DJ Deadmau5 arrives at Spike TV's “2011 Video Game Awards” at Sony Studios on December 10, 2011 in Los Angeles, California. (Photo by Christopher Polk/Getty Images)

Japan' s Kaori Sakamoto competes in the women' s single skating short program of the figure skating event during the Pyeongchang 2018 Winter Olympic Games at the Gangneung Ice Arena in Gangneung on February 21, 2018. (Photo by John Sibley/Reuters)

Resident Taina holds her brother Ysaque in the hallway outside their apartment in an occupied building in the Mangueira “favela” community on August 13, 2016 in Rio de Janeiro, Brazil. (Photo by Mario Tama/Getty Images)

Artists perform during the Closing Ceremony of the Rio 2016 Olympic Games at the Maracana Stadium in Rio de Janeiro, Brazil, 21 August 2016. (Photo by Sergei Ilnitsky/EPA)

Skeleton involves a person riding a small sled down a frozen track while lying face down. The sport is a more intense form of luge because skeleton competitors leap onto the sled and slide downhill head first. Skeleton athletes can reach up to 80 mph on straightaways, causing forces up to 5g, so the helmet is a critical component for attitude as well as safety.