Things and stuff
ruby-1.9.3-preview1 :015 > t1 = Thing.new
=> #<Thing:0x007fcaf104fa60>
ruby-1.9.3-preview1 :016 > t2 = Thing.new
=> #<Thing:0x007fcaf2001008>
ruby-1.9.3-preview1 :017 > t2.cache_some_stuff(:foo, 1)
=> 1
ruby-1.9.3-preview1 :018 > Thing.instance_variable_get('@cached_stuff')
=> {:foo=>1}