why is it that when you............?
822212
Most people use race as an additional descriptors.  You can say "Do you know Joe?" but the person you are speaking to may know 50 Joe's.  So if you add their race it usually narrows down the number of Joe's someone might know.  Is this a bad thing?  It can be but I think most people do it out of pure innocence.
361829
Why do people do stuff like that?
101777
Probably for bad behavior.  It happens to me all the time.  Ouch!  Mom! Stop that!  Bye!
789370
Probably compensation for an unnatural move...it doesn't feel right, so your body tries to compensate for it.
419560
Help, thats the word........ Thats all why we do this
471922
it happens when someone is gossiping about you!\n:)
498560
you're right. Why?????
850342
OH MY GOODNESS yo i do the same thing! about the "what did i just do " effect! and ask god why this happens yo we have a lot in common stay with me on this yahoo thing please i wanna get to know you!
726147
That is a good question I have always wondered that myself. SO I'm assuming it is normal since we both experience it. How ever I don't know what causes it.
570360
i never really understood this...but ive been experiencing that since my 8th grade basketball team and all through high school. *shrugs*
644155
I know what you mean.  It only happens when I'm on-line.  I'm curious to see the answers because IT DRIVES ME CRAZY!!!!
10193
Yes, It is perfectly normal, It happens to me a lot. It's where your body needs to move or when you feel really happy/ excited.
1020733
bc you sit up while you are sitting down
537781
there is a thing like that...? im puzzled
466032
That happens at times when you become pregnant. It could be preparing you for breastfeeding. Just ask your doctor and he will know exactly why.
988486
Well that is normal. It happens to me too. i just had it twice in the past month. I think it is your body changing. With me when that happens to me the week i have it like you having it now, the next month (july) you'll have it about the same time as you have it now. It happens to me. I also think it might be your diet, fitness, or stress level. Your body is probably getting mixed messages.
433314
Usual this does not just happen at one time of the day so if that is the case then it may be because of one or more of the things you have listed.  I suggest you eliminate them one by one ans see what happens.