Siegfried Woldhek sketches TEDGlobal

At TEDGlobal 2011, portraitist Siegfried Woldhek sat down in the Autodesk Café with an iPad and some special drawing software, and proceeded to sketch, with lightning speed, anyone who took a seat in front of him. You can see his work in his iPad Portraits Flickr set — attendees, TEDx hosts, Coffee Common baristas, and TED Fellows, all sketched in his inimitable style.