A Rhyme

Read the paragraph below .....and try to understand the meaning.

Two individuals proceeded towards the apex of a natural geologic protuberance, the purpose of their expedition being the procurement of a sample of fluid hydride of oxygen in a large vessel, the exact size of which was unspecified. One member of the team precipitously descended, sustaining severe damage to the upper cranial portion of his anatomical structure; Subsequently the second member of the team performed a self rotational translation oriented in the same direction taken by the first team member.
(This is translation of an English Rhyme. Can you find which one ??) . . . . . .
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Jack and jill went up the hill
to fetch a pail of water
Jack fell down and broke his crown
and jill came tumbling after!!!