In order to determine the location of the leak, the crew had been sealing off small peripheral modules of the space station while Mission Control looked for accelerated pressure drops inside the sealed-off sections.
There's also the more expected bits -- things like keeping track of your motorcar's location in order to retrieve it after a long, confusing day at Disneyland, but the real magic here is the promise of what's to come.
Developed by the University of Minnesota using funding from DARPA, the Recon Scout resembles your average barbell weight, but when you're not workin' those triceps, this little fellow can be heaved across flatlands, over fences, and into brick walls in order to secure a location and start feeding back video of its surroundings.