Blackout
The composition of this diary entry was interrupted by a blackout on my block which lasted for at least several hours (the power came back on after I went to bed). I was told that a transformer exploded somewhere nearby. Our UPSes lasted for an hour or so, but after that, no more Internet access, no more computer use, no more electric lights. "It was like another century", but not really.
I tried writing a letter by candlelight, which was an unusual experience, but I guess the only real benefit was that I got to write truthfully that I was writing that letter by candlelight. I suppose I could do that any time I want, since I have candles (I no longer live in the Berkeley dorms). But I wouldn't usually think of it; if it happens, it probably happens by accident.