The only thing I recall was that it was a little unnerving, sitting there watching blood drain from my arm. I didn't experience any faintness, and the only thing I took from the blood drive (besides the free stuff ) was a small bruise at the site of penetration.
No I don't fit the weight requirement If I did meet the requirements though I'd be willing to donate blood. My school's famous for being one of the top blood donors in the nation.