catgal - I didn't mean to scare you! I have the same reaction as JennJenn. I get a strange taste (not unpleasant, just odd) in my mouth and my lips sort of buzz. I get cold as well, about halfway through the donation, but they're always ready with heated blankets. Also, I have some attention issues so sitting still for 2 hours is a little tough on me but when I went a couple of weeks ago I took my KindleFire, downloaded a movie and when I got antsy, I could browse the Kindle. It was perfect for me.
The only other weird thing that happens for me is when the needle stick isn't quite right, there's a flutter in the vein on the return trip and that just makes me twitch.
I actually have been afraid to donate plasma because I thought it was a bigger needle and a harder thing to do so it's sort of cool to hear that plasma isn't such a big thing either.
JennJenn, isn't it weird that we feel bad when we can't donate? I also have problems with getting my iron levels up high enough to donate so about half the times I go to donate, I get bounced. eclecticGuy has started refusing to leave until after they do the initial evaluation because he got tired of getting called back when he was halfway home. But then I'm sad that I didn't do my part.