At least 57 people were injured, two of them critically, when a New York-bound ferry crashed into a dock in Lower Manhattan Wednesday, authorities said. It was not immediately clear what caused the crash, which occurred around 8:45 a.m. Emergency crews carted several passengers on stretchers toward ambulances, and there was a gash on the front of the vessel. "There was a large jolt," said passenger Elizabeth Banta. "It felt like we were in a car crash. ... Several people were thrown into the air and onto the ground." Witnesses said several passengers were waiting at the top of a stairwell aboard the vessel as it approached the dock and were flung…