For the last four days, MUNI contractors worked around the clock replacing tracks at the corner of 30th/Church in San Francsico. It cost $3 million. Using a Canon A590, Ken Murphy made this incredible 12-minute time-lapse video of the construction.

One of the amazing things about this screaming fight on a San Francisco Muni bus is the way the citizen cameraman deftly captures every moment. At one point he's even shooting over his shoulder. Cell phone cameras never sleep, straphangers.