Saturday started completely normally for me. I got up, messed about, showered, put on my clothes, and headed out the door, and grabbed a bike from the Capital Bikeshare stand near my apartment to head for Union Station. I had just turned the bend and had Columbus Circle in sight when black patches started appearing in front of me and my vision started to fade. Everything was spinning and it was getting harder and harder to hear so I slowed the bike trying to halt completely before I crashed to the ground and split open my head.