DUDE. Same thing happened to Pablo and I when we were heading back from Safeway one night. This drunk dude was walking down the stretch of mission right before you get to Western (the darkerst part) and I almost hit the guy. He was walking down WITH traffic flow, but in the middle of the lane dressed in black.
Pablo, Ricardo, Beau, and I later went to see if he got run over yet, sadly only to see the cops pick him up.