All appliances in house go out in power outage but not the digital clocks?

So a couple nights ago at around 11 PM, my room lights flickered on and off and the TV cut off and back on, obviously a power outage. Then, as I went to go tell my parents, my room light looked brighter, kinda hard to explain but it's just a normal room light that appeared to be almost twice as bright. I assumed it was a result of the power outage doing something to our circuit board just sending extra surges of electricity. The lights flickered on and off again before I got there, but this never happened again. The weird thing is that everything in the house went out (TV, fan, printer, microwave, etc.), except for three digital clocks, all plugged into different outlets, no batteries. I've heard that it's possible for temporary outages "sensitive equipment" like fans and TVs can go off, but clocks can survive. The only thing is that one of the clocks that survived is very sensitive. We're talking the power goes out the instant I unplug it. I just don't think it would be able to survive, and that's kinda creepy to me. I was hoping for a skeptical opinion, I asked on another forum more about circuits and electricians, and although they were helpful, most gave me possibilities that didnt seem as likely with the sensitive clock

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