This may seem like a weird question, but...

I've heard that it's something to do with cortisol levels being high at that time of night. Cortisol is associated with a response to stress, so it might explain why we have nightmares, or feel anxious if we're awake at that time of night. I used to always sleep through the night, but now that I have kids, an annoying cat, and a snoring husband, I often get woken up around 2 or 3 am. Whenever I do, I seem to lie there, obsessing about some imagined harm that might befall me or my family. I think crazy thoughts, like there's no way I'll ever let the kids ride their bikes again, or that I need to board up their windows to prevent them from falling out. The next morning I'm back to normal and suggesting that the kids ride their bikes to school. It's quite a bizarre phenomenon.

yes, i feel the same way. But here in the east, i think most people are aware that between 3am to 4am it is the darkest time of the day and most of the "negative" things are out for "fun". This is also the time, as I've experienced, where most of my nightmares occur, even when i'm half-awake, twice happened that I felt so weird because I was awake but felt I was half-awake. I can't explain it but it is a natural occurence, i guess. Also, this is the time that most babies are always alert, my eldest always wakes up exactly 3am almost every night when she was 2 years old.

no i don't experience any such thing on regular basis. however, on some days i just get an edge over other days. i would be just more sharp and have proper repartites and puns, i would manage stuff in a jiffy and perfectly. i would do things with a perfect touch. this is seldom though. by the way, what you apprehend during that hour? and does this happen on regular basis ??

Nope your not strange, I am with you on this one.. Hence why I am up with you. I can not say I am a true insomniac, because I can sleep in the afternoon, and about 6:00am I will be wanting to go to sleep, just in time to have to be up and starting my day. I can also sleep well in the evening, but something about the magical twilight hours after midnight is when I want to roam, and piddle with my hobbies. I love the fact that the rest of my "world" is asleep, the house is mine, the night is mine. I am not sure it freaks me out, I accept it, my family on the other hand worries I am not sleeping enough.

You are not strange. I don't have a certain time of day but I get that kind of feeling just before something bad is about to happen.

yep, just after my office when I drive back home, I am a little weird by then. So its around six in the eveneing that I start loosing my temper. Behave a little nuts, shout on every small thing, do lots of worrying and thats it. After around one hour, when all of my energy and strength to shout or frustration oozez out, i become normal. LOLZ