How to reboot barakta's desk.
What. You kicked it ☺
It goes up and down, so she can vary her posture. For barakta-friendliness, this is motorised, rather than the usual hand-cranked arrangement, and it's a legal requirement to hum the Thunderbirds theme when it's in action. She was demonstrating this to nikki OTP, when it got to the bottom of the range of travel and stubbornly refused to move again (which, with hindsight, I realise is preferable to it getting stuck at the top - about head height).
Turns out there's a procedure for calibrating what position the motor controller thinks it's in. Invoking that brought it back to life. And yes, I did try thumping it first (and more scientifically, checking the continuity on the switch, which is a known failure point).