Werner Adendorff and Allan Horton have risked their lives riding a South African slab.

These days, you've got to know what you're doing with a boogie board. Touching rocks while barreled? Come on... Only in a video game. This is dangerous stuff, boys. And kelp means survival.

Brad Spencer, Annissa Flynn, and Daniel Tarapchak have taken out the 2018 World Flowboarding Championships, in Punta Cana, Dominican Republic.

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