What are psychological reasons why this would occur?
122942
Whether it is insomnia or excessive sleep; depression effects each person differently. Some people eat; some stop eating.\n\nChemical imbalances add up to the differences -and also the confusion as some medications work for some and don't work for others. Along with this - some therapeutic interventions work for some that would not work with others. Although the feelings may be the same (low mood, pervasive sadness, "blahs") the "route" that the feelings take is totally different from person to person.
378214
It is a nervous condition.  Really. Happens to me sometimes too. I find it useful to get away from the source of aggravation.
588981
It seems there's a variety of things that can cause this.  If you go the link below, you'll see a number of different things people did to resolve this issue, especially on page 2.
421637
Various reasons:\n\nSudden change in exercise\nSudden change in diet\nStress\nIllness
190461
I'd like to know why?
149909
The scientific explanation is simple enough.  It is the automaticity of stimulus response.  There are numerous other stimulus response automaticities "built into" the humanoid organism. Another specific would be the shiver mechanism that automatically kicks in (for some humans) upon exposure to a suddenly colder temperature.
496194
Its caused by holding pencils or pens.... many people have them...
437109
More than one medical condition (psychological-schizophrenia, bipolar mania, acute manic episodes, and a variety of drugs) can cause this. If you know someone with these symptoms they should see a professional to determine the cause. Many times the "voices" are harmless, but there have been many cases of personal injury or injury to others due to this phenomena.
92251
Since none of us died, we don't know if that happens. It may be crazy survivor stories. Or it could be when your brain can't get enough oxygen, you may have synestatic experiences due to a hormone imbalance.
559570
IT COULD BE STRESS OR ANXIETY
512755
Any reason, other than superficial ones?
327754
You are describing two Psychological phenomena known as Depersonalization and derealization. Usually happen to people under stress, watching themselves from outside, helps them dissociate from the experience, and makes it less stressfull. I guess in your case, you learned how to bring it on in other states of mind as well.
316381
SOME TIMES WILL HAPPEN LIKE THIS, PROBABLE YOU ARE GETTING YOUR CYCLE EARLIER.
393301
There's many reasons, the main one would probably have to be because the server is down. It'll be back in a while. It has happened to me many time and I had felt like punching the computer
133481
This is likely more a conscious/subconscious effect than anything really scary.  When we decide we "want" to do something, our conscious mind is not usually the instigator of it.  The great majority of what we do is either totally unknown to our conscious mind (like scratching, or shifting in our seat) or vaguely associate (like what part of a meal to eat next).  We rarely plan exactly what our next motion is consciously-and even when we do specifically think "I'm going to do *that*" we dont think about the exact way we will do it. Those studies addressed the poorly understood motivational parts of our mind, which likely make these choices prior to telling the "conscious" parts of our mind what the primary goal is.
489814
Possible, talk to your doctor, it can happen.
514436
Stress and..depression. Could. Lead. To all kinds of serious health problems (stomach ulcers included).