Just a few moments ago I was pulling into the parking lot at work. A cyclist used our parking lot as a shortcut for getting from 9th Ave headed towards 8th Ave for whatever reason instead of using the sidewalk or street along F street. That is the wrong direction in a one way parking lot. She was: not wearing a helmet, listening to earbuds, and going at high enough speeds that when she saw the front corner of my truck (I didn't see her yet since I was still coming around the corner of another vehicle) that she left a 6 foot long skid mark in the parking lot. I didn't even know she was there, or knew how close she got to my truck when she stopped, until my truck came far enough around the corner of a vehicle that I could actually see her. Nothing really I could have done to avoid it, since I had no idea she was there. I was thankful I always drive slowly in that lot, and frustrated that she'd be that irresponsible in her cycling behavior.