Surfers and beachgoers couldn't believe what their eyes were seeing.

A giant arcus cloud flew over the ocean at Sydney's Bondi Beach. Initially, people took pictures with their cell phones, but in a matter of minutes everyone left the beach and heavy rain took over.

The shelf cloud, a type of arcus cloud, is a giant, low, horizontal cloud formation. It is often associated with thunderstorms and rain.

Thirty Formula GPS kiteboarders battled it out on the mountains of the Alto Sangro, Italy, for the second leg of 2018 IKA Snowkite World Cup.

+ Kiteboarding News

Brad Domke calls Cylinders his home. He's been riding it for more than a decade. But you've never seen him in board transfers like these.

+ Skimboarding News