Some Hawaiians are reviving the ancient sport of lava sledding. Lava. Sledding.
The sport fell into disfavor in the mid 1820s because of pressure from Christian missionaries. Sledder Tom "Pohaku" Stone claims this is because "they didn't want people to have any fun." The fact that the sport was used as a form of worship for Pele the fire goddess might also have something to do with it. (This is similar to why the Olympics fell into disuse.)
The sport actually involves sledding down runs made from lava rocks on a bed of slick mud and grasses. Nobody has died yet but Stone has broken his neck. Stone teaches at a local college by the way. That is less of a surprise than it should be.