For the past 10 years, Switzerland’s Indi-Jürg Schläfli has practised the extreme sport of high-speed inline skating. Schläfli travels around the globe showcasing his skills in different events, such as car racing, stunt shows and charity events. Thus far, he’s achieved a daunting 304 km/h behind a car and 278 km/h behind a motorbike.

Attached to the back of the racing car or motorbike, there is a specially designed frame that Schläfli holds onto. The world-record speeds are only performed on racing tracks that are absolutely flat. Even a single bump could mean a dangerous fall.

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