So Musk's shiny rocket test flight ended with an explosion, and his explanation was, "Fuel header tank pressure was low during landing burn, causing touchdown velocity to be high & RUD". RUD apparently stands for rapid unscheduled disassembly.
Which is the most wanky way to describe a crash I've ever heard.
Musk didn't come up with it.
Quick search found a thread with examples of similar phrases being cited in print in the 1970s:
The social network of the future: No ads, no corporate surveillance, ethical design, and decentralization! Own your data with Mastodon!