A San Francisco Municipal Railway bus struck a fire hydrant Sunday evening and caused flooding to at least one nearby building after an incident in which a customer was injured after falling from the extended wheelchair lift of the vehicle, a Muni spokesman said. At about 5:45 p.m., a customer was exiting from an electric trolley bus traveling south on the 22-Fillmore line after the vehicle had stopped at the intersection of Fillmore and Haight streets, spokesman Judson True said. [4]

While Muni has not issued any comment or service alerts either to the media nor via 511, AlertSF says that as of 6:55 PM, there will be a " Traffic disruption for the next 2 hours at Fillmore and Haight. With that and the shattered window on the front door, some are musing that the chair lift was extended while the bus was in motion. [2]

Update II: Sorry, y'all, last night's update needs an update -- we were a little out of it from the Super Bowl imbibing. It's not clear whether the person using the wheelchair lift was actually in a wheelchair, just that they fell from the lift and were taken to the hospital. [6]