In Nazaré, Portugal, surfers come together to surf some of the biggest waves in the world. And when conditions get real rough, it's Black Naza time (YouTube link).

Nazaré is the world's stage for the biggest waves ever ridden, most of the memorable rides so far were all during big days with favourable or at least sufficient conditions for surfers and safety teams to ride and operate… when conditions go beyond that point, we call it Black Naza.

Via Holy Kaw.