From the family iMessage, reproduced for your amusement:

Other day: I’m outside fiddling with the batteries in the automatic watering thing.

Sylvia and Zoe are in the bedroom. The patio door is open.

I refit the watering system, but it’s not fitted well and when I turn the tap on, it sprays water right onto the power socket that the outdoor WiFi access point is using.

The lights on the balcony went out, but some of the stuff stayed on.

I immediately figured out what happened: I’d caused an earth short with the water and tripped the RCD.

But I didn’t swear because I immediately knew that all I had to do is dry the water and flip the circuit breaker.

But before I could apologise to the other two, Zoe’s voice erupts in a blind panic:

“Sarah! Sarah! Are you ok?”

Me, “Yes. I got water on a power socket and tripped the RCD. Sorry”

Zoe, with massive relief, “we heard the click (RCD going off), and you didn’t yell and we were worried you were dead”

Upshot conversation took away some matters to note. Mainly that the RCDs work (I already know this from accidentally grounding neutral while wiring a socket. That’s so annoying), and an action going forward: if Sarah does something that trips an RCD in future, she will immediately swear loudly.