File:JBidenTitusville10-28-2008.jpg

During an unscheduled stop at an Obama campaign office, Joe Biden makes a joke after a caller refuses to believe it's really him, Titusville, Florida, 28 October, 2008.

The campaign volunteer seated next to Biden is unidentified.

AP Photo by Joe Burbank, found at: DayLife.com, All contents © copyright 1999-2008 Getty Images, Inc. All rights reserved.