For the last few months, the MTA has been blasting through the city streets of the Upper East Side as work on the fabled Second Avenue subway picks up. Second Avenue Sagas posted some startling video of a recent controlled explosion that took place last Friday. The force of the blast looks like a minor earthquake and sounds even worse. But this is the work that needs to be done as they prepare a so-called "Launch Box" for the Tunnel Boring Machine that will carve out the new "T" line deep under the city's streets. Completion is schedule for....oh, somewhere around 2016. Yikes.