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.

An Orchid Mantis (Hymenopus coronatus) is perched on the head of a frog hanging from a tree branch on March 15, 2017 in Padang, Indonesia. (Photo by Riau Images/Barcroft Images)

Tourists dressed like astronauts visit Ulan Hada Volcano Geopark on February 13, 2024 in Ulanqab, Inner Mongolia Autonomous Region of China. (Photo by Mao Jianjun/China News Service/VCG via Getty Images)

Pedra da Gavea highline, 850 meters above the city, 100 meters direct exposure, March 24, 2013. Brian Mosbaugh on the line. Carefully tiptoeing almost 3000 metres above Rio de Janeiro on a thin wire got a bit too much for this adrenaline junkie – so he decided to have a LIE DOWN. Fearless Brian Mosbaugh is so used to the perilous heights he decided he deserved a short break and proceeded to kick back and relax over the famous Brazilian city. (Photo by Scott Rogers/Caters)

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A woman poses for a picture during Lunar New Year's Eve on Yaowarat Road in Bangkok's Chinatown, Thailand, February 9, 2024. (Photo by Jorge Silva/Reuters)

A woman aims a World War II machine gun at a military show during celebration of the Defenders of the Fatherland Day in St.Petersburg, Russia, Tuesday, February 23, 2016. The day, celebrated in Russia on February 23, honors the nation's military and is a nationwide holiday. (Photo by Dmitri Lovetsky/AP Photo)

A person in costume is pictured during the annual Easter Parade and Bonnet Festival on 5th Ave in Manhattan, New York City, U.S., April 17, 2022. (Photo by Andrew Kelly/Reuters)

The anthropomorphic robot named hitchBOT sits on the shoulder of Highway 102 to begin its 6000 kilometer cross country journey outside of Halifax, Nova Scotia, July 27, 2014. The hitch hiking robot is part of a social experiment to see if drivers will pick up and drop off the robot in one piece to an art gallery in Victoria, British Columbia. (Photo by Paul Darrow/Reuters)