forkIO $ threadDelay 10000000 >> writeIVar iv' "my spoon is too big"

   writeIVar iv' "i am a banana"       -- throws error "IVar written twice"

Nice Don Hertzfeldt reference. ;)

If this means nothing to you, here's the animated film from whence this came:
  http://www.youtube.com/watch?v=MuOvqeABHvQ

Sean