I surely do hope you "got" my Schoolhouse Rocks reference.  You're never too old to enjoy Schoolhouse Rocks - that's what I say, anyway.  It makes me remember back to my days in junior high social studies class, memorizing the lines to "I'm Just a Bill."  Our teacher, my very favorite of all time, utilized so many memorable teaching tools that stayed with me to this day.  One of the things I remember vividly was her poster of a cat nearly falling off a tree branch (I always wonder if the photographer gave him a hand after snapping the picture... Just seems cruel.), and it read as you probably remember, "Hang In There."