Leo Robson at The New Statesman:
It is probably fair at this advanced stage to note that Pynchon has an incurable obsession with language: its capacity for behaving like glass or gauze. The opening paragraph of Gravity’s Rainbow (1973) – “A screaming comes across the sky. It has happened before, but there is nothing to compare it to now” – makes a point of stating where eloquence can’t go, either because we don’t hear V-2 rockets any more, or we no longer hear anything that resembles them, or because the only people who might have heard them were dead by the time they got the chance (being supersonic, the V-2 announces its arrival after it has already landed). But then “screaming” is already a comparison, a clarifying anthropomorphic metaphor. Fastforward more than half a century – from 1944 to 2001 – and there are even more phenomena to describe or half describe, more slang to borrow from espionage and economics, erotica and psychiatry. One of the things that Pynchon wants to expose is the way we massage things into metaphor and then forget that we’ve done it.
The book’s title, though a term in its own right (meaning new technology with risks attached), is repurposed here as a pun on a metaphor – the word “pun” being, as Gottlob Frege points out in Pynchon’s novel-beforelast Against the Day (2006), “und” upside down and back to front and a good way of bringing things together.