I get the doors & pedestrians thing too often as well, I just realize there are areas where it's going to happen and slowdown, even remain alert and on constant vigil, expecting it to happen. The other day I was riding and a bus and I took turns passing each other. What an annoying trend and cycle to get into. I rode, the bus would come up from behind, pass me, only to stop just ahead at a bus stop. I then retook the lead momentarily by passing the stopped bus. This went on for about 2-3 miles and finally I just got too annoyed with it (I can't imagine it being any more enjoyable for him either), I stopped long enough to let the bus get far enough away.