@Maker_of_Things @suearcher @afewbugs @JimmyB In the early 80s, when I would have been ~10, we had a telly with 8 channel buttons which could be individually tuned. Pressing one would release the other, but I discovered you could press two in at once and get a different frequency. So I experimented, which inevitably led to pressing all eight in at once, except there was now no spare button to release them.
Mum had to call in an engineer…