So who do you think this is?

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, 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 orientated in the same direction by the first team member. (Source unknown)