Disappearing puppy

Yesterday I took my eyes off Nova for 30 seconds and she was gone!  I knew she couldn't have gone far.  I've used gates to keep her in the kitchen/family room area.  But, I couldn't find her anywhere!  I finally decided to test her recall and she came bounding out from behind the couch.  Covered with dust bunnies!  Hmmmm, maybe she can earn her keep by dusting behind my furniture?