The title promises a tidy explainer, and the poem keeps the calm, factual voice of one. But the first sentence already slips out of focus: "a tragedy and a bit of a mystery descended / to within five hundred feet of the vast majority." Is something landing on a surface or arriving in a body? Pamela Hobart Carter lets two kinds of writing share the same sentences, one about a spacecraft touching down on an asteroid, the other about how a stroke happens. Neither takes over. The poem never says where its language comes from, but it reads as if two separate explanations had been cut up and dealt together.
The joins are where the poem is most inventive. Take "this blurry image of floating forms at the site of the tear travels across the rocky surface / to the brain." The sentence starts with something like a scan or a photograph, passes through a "tear" in an artery, crosses a "rocky surface," and ends in the brain. Grammatically it holds together, but physically it is impossible, and that impossibility is the point. A few lines later, "a day is about seven hours long inside the bloodstream" turns a fact about a spinning rock into a fact about blood. Scale collapses. The body becomes a world with its own weather and orbits, and the world becomes something that can have a clot.
Nothing on the page is punctuated or capitalised, and wide gaps cut through the lines. These gaps work as hinges, the places where one vocabulary hands the sentence to the other. They also leave the reader to do the connecting. In "no one knows why the clot is swept a bright protrusion near the pole to the brain," you have to choose whether to read across the gap, and either way you are doing the splicing. There is no rhyme and no steady metre. What holds the poem together is sound, especially a drumbeat of hard b's: "blurry," "brain," "blocking," "blood," "bright," "bead," "bloodstream," "backwards," "burst." The plosives feel like small impacts. The poem even names "a rhythm disturbance," and its own rhythm is disturbed. The form seems to behave like the event it describes, though that is my reading rather than something the poem states.
The imagery is built from hard, bright, countable things. "A diamond / an abacus bead" could be the shape of a rock in space or of an obstruction in a vessel. Either way it is beautiful and small, an object you could count. That is unsettling, because the poem's human beings are also counted. We meet "the vast majority," "much older people," and "younger age groups" before we meet "a person," and that single person turns up only near the end, with a "rhythm disturbance in the opposite direction." Even the blood appears from a great height, as "a small dot." The detached tone of space reporting and the detached tone of public health reporting both turn people into data points, and the poem makes us notice the cost.
Motion and direction run through the poem. "The asteroid spins backwards" is matched by a heart rhythm going "in the opposite direction," so a reversal in the sky echoes a reversal in the chest. Phrases such as "hopped to a new location" and "photographed its shadow while falling" are comic for a moment, then alarming, because falling is also what happens to a person in a stroke. Even the cheerful settings, "playing sports" and "riding rollercoasters," are presented as ordinary places where catastrophe can start. The poem keeps its offhand tone as it says so.
The ending refuses to settle. "Cutting off a burst flooding tissue" holds both kinds of stroke in one fragment, a blockage and a bleed, and it ends on participles that never finish their action. After a line like "no one knows why," that open ending seems honest.
The poem matters because it makes familiar explanatory language strange. Clinical and cosmic registers both promise to make disaster understandable, and by forcing them together Carter shows how much each leaves out. What remains is the suddenness of the event, and the uneasy fact that a body can be as large, as unknown, and as far from rescue as a rock turning in space.