As you were headed down the 17th street underpass and I was headed up. I understand you were trying to pass the slower traffic and following your friend, but rounding a curve while descending and coming all the way across into the far side of the opposite lane was dangerous...and other adjectives. How I managed to avoid you in a head on collision and not spill or wipe out is a small miracle. It took me 2 miles to get my heart rate down, it was that close.
Please, for the sake of us all, don't do that again. Nothing is important or urgent enough for that kind of stunt, and its just not cool. You are going to hurt someone, and that's not cool either.