This has happened to me in the past.  This year's hairball, however, got deposited on the bathmat in front of the toilet.  I squished it first thing in the morning, before I'd had even one cup of coffee, between my toes while using the toilet.  But that's better than finding it days later, petrified and bonded to a throw rug (or in my sneakers).  Please e-mail me at:  pjones41@kc.rr.com, and come join me on facebook, too.  Farmville, anyone?