I think he/she may live in Minneapolis.  The most major bike (and pedestrian) path which runs right through the city is called the Midtown Greenway, colloquially "the greenway."  It is crazy busy on spring/summer weekends, especially with walking fatties.  However, If you want to see the shittiest of shitpeople, head out at six a.m. on any day of the year (especially winter days).