yme scheme in "juggler" is [A,B,C,B,A,C] which shows a clear but not a regular rhythm. One of the main criteria that affect the rhythm of any poem is the poets/speakers punctuation. A lot of commas are used, no semi-colons, one exclamation mark and a few full-stops. All these punctuation's slow down the process of reading.
"A ball will bounce, but less and less. It's not..."
By adding punctuation's it gives more meaning to the words and shows it's importance by reading it slowly and carefully. After the fall-stop the speaker changes his tone, this is shown by the difference of expressing himself and saying "less and less" and then saying "a light-hearted thing...".
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