For 15 years, the best thing the ballsy U.K.-based parkour team known as Storror could say for a successful stunt - whether jumping off a cliff together or leaping between tall buildings for videos they uploaded to YouTube - was that none of them had died in the process.

SXSW: Bay's foray into nonfiction is a portrait of seven daredevils who aren't ready to grow up despite approaching middle age.

Michael Bay directs the documentary "We Are Storror," about the parkour group who gained a massive following on YouTube for death-defying stunts.