ISS - "Umm, we have a lost tool," came the heralding cry of Heidemarie Stefanyshyn-Piper who, while cleaning and lubing a joint on a wing of one of the station's solar panels, let a tool bag drift away just beyond her reach. The mission was able to be salvaged, however, as fellow spacewalk astronaut Stephen Bowen shared his tools with Stefanyshyn-Piper to complete their work in 7 hours.
The tool bag contained approximately $100,000 worth of tools and was one of the largest items ever lost by an astronaut on a spacewalk. NASA is currently altering future spacewalk plans as a result of the mishap.