Because they just do.
you sometimes fail so badly because you're not really concentrating a lot or sometimes you are too overconfident that you fail
it's not!. it is how autocrasies fail.
sometimes no and sometimes yes
Wires sometimes fail. Nails and other fasteners sometimes fail. Hooks fail. Wallboard materials sometimes fail. Sometimes pictures are improperly hung or hung with inadequate materials. Attributing some kind of meaning to an event just because the factors causing it are not clear doesn't make any sense at all.
Yes, you can sometimes you it can fail and you will have to replace it.
Because they fail successfully.
It can sometimes be caused by a failed alternator.
Yes,but some of them sometimes fail!!
computer sometimes fail due to CMOS (complementary metal oxide. semiconductor) settings.
sometimes good ones sometimes fail ones. sorry :-)
sometimes fail or make lots of smoke then shoot off!