I still remember the day this happened, though I was adept enough to not hit a parking meter. There was an unusual amount of trash on the sidewalk so it was at least a block before I could pass these people. Sometimes people sense someone is closing in on them so they either move aside or give a head turn to make sure they acknowledge their presence. These particular people did no such thing so I just had to jump into the street to pass them as soon as the opportuniy presented itself.