do you guys ever get this>

[Caution]

yh, i get that a lot.

[OMGitsaROSS]

sitting down, then you stand up quickly and are dizzy? feel like you fall over?

I get that ;D

[RedStratocas]

Yes, that happens to everyone if they sit down a long time and stand up really fast.

[Axel]

It's normal, headrush ftw.

[Redmoon Evil]

not soo much anymore but I used to get it alot, I've passed out twice from it lol.

First time I got up to turn light on passed out, then my mate phoned me few mins after to find out why I wasn't talkin on msn .

Second time I got up to turn light on again and I passed out against wall, duno how long I was out that time but my left side of my face was numb because my head had been supporting me pretty much lol

[Xuggle]

Yeah, reason is (if not posted):

You've not been doing anything, you've not used much oxygen, so you've been breathing in less. You stand up and make your muscles work, therefore they need oxygen, which you dont have enough at that moment, and your head gets dizzy. ..... I think.

I choked once, it happened (due to lack of air) almost died. What a lame way to die!

[Smiddy]

when you're sitting down and then you stand up and your vision goes all weird..

i cant explain it.

if you rub your eyes for about ten seconds then thats the experience i get when i stand up

Used to, haven't recently though. Usually get it in warmer weather.

Perhaps you're dehydrated to, seemed to help me when I suffered (drinking more water) and I still drink alot of water now & don't get it.

[foxyfox00]

I agreee with Luke its probarbly due to low blood pressure. Or the other people who suggested dehydration / heat stroke which affects your blood pressure and core temperature.

I get it alot at night but its becuase my eyes are tired and im not wearing my glasses or I get it if ive had them on too long.

But if it gets too bad go see your GP
GL ♥

[Nixt]

Yeah I get it a lot, I have fainted once from it actually and another time I just had to sit down in the kitchen randomly because I felt like I was about to collapse. My Nan thought I was a bit weird :].
I was a little worried at first but it has happened to a few of my friends too and it does seem to be something that happens if you are sat down for long periods of time or w/e, as people have said.

[Jamie!]

aye, all the time.