Bystanders rush to help those who were struck by a vehicle early Thursday on Red River Street in Austin, which was crowded with people headed to South by Southwest events. Jay Janner/Austin American-Statesman/MCT/Landov hide caption

itoggle caption Jay Janner/Austin American-Statesman/MCT/Landov

Bystanders rushed to help those who were struck by a vehicle early Thursday on Red River Street in Austin, which was crowded with people headed to South by Southwest events. Jay Janner/Austin American-Statesman/MCT/Landov hide caption

itoggle caption Jay Janner/Austin American-Statesman/MCT/Landov

Screenshot from Apple's "Photos Every Day" iPhone 5 ad picturing a scene from the Yeah Yeah Yeahs performing at NPR Music's SXSW 2013 Stubbs Showcase. Screenshot via apple.com hide caption

itoggle caption Screenshot via apple.com

Festival attendees experiment with Leap Motion technology. Elise Hu/NPR hide caption

itoggle caption Elise Hu/NPR

A screenshot shows how a team would track changes to its rocket project on a Sunglass platform. Sunglass hide caption

itoggle caption Sunglass