This could be a quite remarkable "tool catch", a pneumatic nail puller! What is the NailOut? This is how they explain it on their website:

Simple...a pneumatic nail extractor. NailOut removes nails with the ease and speed of Air. It's handheld size coupled with pneumatic power makes this tool up to 10 times faster then a cats paw. This tool specializes in removing nails from wood construction connectors and other hard-to-reach places.

ExtremeHowTo.com quoted the NailOut as "Using over 4,000 blows per minute, the sharp edge of the cats paw attachment quickly digs under the nail." That''s 66 blows/second !

Surely better than a cats paw, I've provided you with the YouTube video below. ...maybe they'll send us one and we can test it out for ourselves ...