Eyewitness: 'Very disturbing, very loud'

NEW YORK, NY - DECEMBER 1:  New York Gov. Andrew M. Cuomo (3L) inspects the damage along with emergency crews after Metro-North train derailed near the Spuyten Duyvil station December 1, 2013 in the Bronx borough of New York City. Multiple injuries and several deaths were reported after the seven car train left the tracks as it was heading to Grand Central Terminal along the Hudson River line.  (Photo by Christopher Gregory/Getty Images)
NEW YORK, NY - DECEMBER 1:  New York Gov. Andrew M. Cuomo (3L) inspects the damage along with emergency crews after Metro-North train derailed near the Spuyten Duyvil station December 1, 2013 in the Bronx borough of New York City. Multiple injuries and several deaths were reported after the seven car train left the tracks as it was heading to Grand Central Terminal along the Hudson River line.  (Photo by Christopher Gregory/Getty Images)

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    Eyewitness: 'Very disturbing, very loud'

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Eyewitnesses describe the scene of the Bronx train derailment that killed at least four people and injured 63 others.