I keep wrecking stuff. So far, in three separate incidents, I’ve tipped water all over a computer, Leftwing Idiot’s diary and a cardigan. The problem isn’t to do with arm tics as you might expect, but with my unruly office chair. It’s on wheels that means when I throw myself backwards with a full body tic it shoots across the room and collides with the coffee table. Anything on the table gets tipped over, or crashes onto the floor.

There’s an obvious and easy solution to this problem – a chair without wheels. So I’ve started looking for one.