There I was sat at the computer playing a game of snooker, and all the lights go out, and the UPS alarms go off... Oh well, another power cut - not that common round here but we get a few a year normally. Might as well finish the game while I am at it.
(sprogs appear, did someone turn off youtube^h^h^h^h^h^h^h my homework).
I wander into the hall and notice that the neighbours outside lights are still on... odd power cut, perhaps its only a single phase out.
Then I check my CU and notice the the 100mA time delayed RCD has tripped. Now that is a bit more interesting - it has to be something pretty dramatic to trip that. Something somewhere has thrown a wobbly. Turned everything back on again, all is well.
Twenty mins later SWMBO says "I think I know what the problem was - the oven does not seem to be getting very warm"...
Oh how I enjoy changing oven elements - not ;-)