Some Bostonists found out about this the hard way--by actually being on the green line and having our drivers announce "last stop Government Center"--but the Green Line is closed between Park Street and Kenmore Square this morning after two trolleys collided at Boylston. One trolley rear-ended a stopped trolley, and one car derailed, according to the Globe. Not only were legions (including some Bostonists) made late for work, but the Globe reports nine people complained......