This shit looks neck-breaking dangerous enough, but get this—the track in the Chilean coastal city of Valparaíso is built overnight so the riders do not get to see it until race day ahead of their runs. Mull on that over your morning coffee.

The urban downhill track is more technical than your normal downhill dirt track with tighter, scarier turns and hardly any room to crash. And who built that shit? Quality union labor? Not a chance!

Riders launch themselves out of someone’s living room—someone’s living room!—to start the spellbinding course that clocks in around 2km (1.24miles). They descend from a height of 254.59m (835.26ft) down hundreds of steps at speeds of 45km/h when pedalling and 60km/h without pedalling.

As well as the steps, riders have to negotiate one thrilling ROOFTOP along with the famous Boccaccio stairs that measure 240m in length. After passing Bismarck Square and Atahualpa Street, the riders reach the finish at Aníbal Pinto Square at an altitude of 28.57m (93.74ft).

Czech rider Tomas Slavík performed another faultless run down the urban city track (seen in video above) and was crowned champion for the second year in a row. 35 riders from all over the world took the qualifiers with 15 bikers making it through to the final. The top 3 riders were: 1. Tomas Slavík (CZE) 2:42,101, 2. Matt Walker (NZL) 2:42,643, 3. Matías Núñez (CHI) 2:44,504

More than 20,000 fans filled the World Heritage city hills during the 16th edition of Red Bull Valparaíso Cerro Abajo in Chile.

Story by Tim Hailey and Red Bull, video and photos courtesy of Red Bull