While cleaning a weightless grease spill during a spacewalk, astronaut Heidemarie Stefanyshyn-Piper turned a tool bag into an asteroid.
Heidmarie explains what went wrong here.
A backyard astronomer catches a glimpse of the orbiting tool bag here.
Having trouble viewing this video? Try downloading the latest version of Flash or contact your IT department.
If you have a video that you think we should run, send a link to email@example.com.