You might think of mountain biking as a gentle ride through the woods along muddy tracks, with perhaps a few tricky uphill climbs if you're feeling particularly energetic.
Even the thought of that is enough to leave some out of puff, but the race that took place in Colombia this week really will take the breath away.
Twenty six daredevil riders left the countryside behind to put their lives on the line as they descended through the barrios of Medellin with narrow streets, steep steps, tight corners, crumbling buildings and even an escalator to navigate past in the world's longest-ever downhill mountain bike race.
The 2.3km track snaked through Commune 13 of the Colombian city, which is infamous for its association with drug lord Pablo Escobar.
The track (2,274.485m to be precise) was adapted by experts on a slope of the neighbourhood, as thrill-seekers and extreme sports athletes gathered from all corners of the globe to participate in the record-breaking race.
But never mind the danger, the course gave these fearless riders the chance to show off all their skills, with many performing huge jumps, flips and other tricks along the route.
If that wasn't enough, there was also a lung-busting climb in the bottom third of the track.
Colombia were awarded a Guinness World Record for the longest urban downhill cycling race after hosting Sunday's dramatic and thrilling event.
The record was corroborated with 'topography experts' and the UCI, the world governing body for sports cycling, and was confirmed by Natalia Ramirez Talero, official adjudicator of Guinness World Records.
'This record is to position the city. It is to tell the world that Medellin is one of the best places for action sports,' said Downhill Nation President Javier Garcia.
Chilean racer Pedro Ferreira scooped the first prize of $5,000 (£3,900) after a stunning performance saw him complete the course in a time of 3mins 49.79secs.
Ferreira was joined on the podium by Frenchman Adrien Loron who came second and third-placed British rider Bernard Kerr.
This was the first event of its kind to take place in Medellin and was hoped to promote sports, tourism and the local economy of what used to be one of the most crime-ridden areas of the city. Escobar was the head of the Medellin Cartel until his death in 1993; the drug network was responsible for trafficking around 80 per cent of the cocaine in the United States at its height in the mid-80s and earned him a personal wealth of around $30billion.
That extraordinary wealth came at a huge price to the citizens of Medellin, as Escobar fought wars against rival drug cartels and politicians, with thousands of people murdered during his reign of terror.
Organisers also wanted to capture Commune 13's struggle, transformation, resilience and its potential for the future with the extreme sport event attracting a worldwide audience.