You've thrilled to the death-defying acts at the circus, but have you ever been to the Shriners' Circus, where they string cables from the rafters at precisely the right height to take out motorcycle jumpers?

This impressive trick from Estonia's Ingvar Neumann seems to officially be called the lateral bike flip, although we've seen it referred to as the "Neu Flip," or, in Neumann's words, the "HD." ("For Heavy Drug, High Definition and Happy Day.") Whatever, it's a kick flip on a freaking bicycle, and it's never been completed …

BUCS (the British Universities and Colleges Sport) held their championships last week, and our favorite sport was the cross country mountain biking. Someone was kind enough to put together a compilation of the best wipeouts on the same downhill section, and we can't top their word choice: carnage.

Now that everyone's discovered the insanity of the VCA, videos from this year's edition are starting to emerge. Yep, it's still terrifying, and yep, there are still dogs on the course.

This video's actually from the 2010 Valparaiso Cerro Abajo race through the narrow, mountainous streets of Valparaiso, Chile. But we're just seeing it now, and you need to see it too. Grab your Dramamine.

ESPN's latest 30 for 30 documentary about BMX trailblazer Mat Hoffman may have been a well-timed PR play for the Summer X Games, but it was also a bone-crunching reminder of the deadly brutality of extreme obsession.