I believe its there just so that you will get annoyed, chase after a lizard and squish it, thus causing timon to go off like a mad man and waste his magic frying lizards with lightning spells.
My other guess is that it broke, and is there for a sense of atmosphere, just don't ask me what type of atmosphere.
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Ah! Timon! You're dead!
No I'm not.
Yes you are! Just look!
Oh! So I am!