This was filmed at whats known as "the point" in Lagundri Bay, Nias. An island in the Mentawaii island chain in Indonesia.
The owner of the boat Timotius Wau, runs a surf camp on the island and a surfing charter service. He had the boat anchored in what was a calm area, and left in his other larger vessel to take tourists on a charter to another surf break in the island chain. While away, this swell shaped up to be the largest swell to hit this area in years, and the protected anchorage was no longer a safe place to anchor the boat. The anchor line snapped and the boat drifted into one of the worlds most famous and perfect surf breaks.
No one was hurt except the owners pride, thankfully.