daily riddle

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; the second member of the team performed a self rotational translation oriented in the same direction taken by the first team member.

Can you tell me what this means in "plain english"?