sounds like a green night to me...usually happens when you take far too much for your own good. Which, according to your story, you did...put quite simply, I don't think anything happened that wasn't normal (tho I can't speak for the guys, you might want to find more trustworthy friends)...'going green' is an unpleasant experience for anybody, and its usually completely unexpected. Typically you get a really intense high for a while, then it goes downhill; shaking and twitching are common, but its not severe. probably cold sweats as well, 'the spin is rooming' moments, loss of balance...nausea, coughing, occassionally just passing out from exhaustion...generally a bad time.
Best thing you can do is 1) stop smoking! if you start to go green, get away from smoke and other such nasty things. Go outside, get some fresh air, and relax. 2) Cool yourself down...a cool shower is your best bet, should help to refresh your mind as well. 3) get yourself somewhere mellow...somewhere you won't have to move, and is very comfy...couch, or bed, something like that.

Always remember, don't do anything new for the first time without somebody you trust to keep an eye on you...never know where you'll end up.

And beejo, if you're ever in the Toronto area, I'll smoke you a nice J...welcome to the few, the proud, and the hungry! you can now be called stoner!