A screenshot from a YouTube video showing mountain biker, Evan van der Spuy being taken out by a red hartebees.

Footage of a South African mountain biker's collision with an antelope has become an international sensation, racking up almost 7 million hits on YouTube since being uploaded Monday.

The cyclist, 17-year-old Evan van der Spuy, was competing in a weekend race near Pietermaritzburg when an African Red Hartebeest, which can weigh more than 200kg, crashed into him.

Van der Spuy, already dubbed 'Buck Norris' online, walked away from the freak accident with nothing more than a stiff neck and scratches.

Travis Walker, Van der Spuy's team-mate, caught the entire incident on a GoPro camera strapped to his handlebars.

"It was being in the right place at the right time and Evan being in the wrong place at the wrong time - one of those moments," Walker told News24.

"It was freaky. I saw it coming closer so I braked; [I] thought it would go in between the gap.

"It hit him, lifted him off the ground, [and he] landed in the grass ... he started making weird noises and I didn't know what to do."

Check out the video below: