 A New York City subway train derailed Thursday after being sideswiped by another train, leaving more than 20 people with minor injuries including some who were brought to hospitals. City police said.A one train and a Metropolitan Transportation Authority work train were both traveling northbound near the 96th Street station on Manhattan's Upper West Side when they sideswiped each other at about 3 p.m. Police said at the scene.A derailment happens when at least one wheel of a train leaves the track. About 300 people were evacuated from the passenger train that derailed, and firefighters also evacuated a few hundred people from a third train that wasn't involved but had to stop in the tunnel because of the collision. The collision caused major disruptions to the one, two, and three lines during the afternoon rush hour. The MTA said there was no service on those lines in most of Manhattan on Thursday afternoon. The MTA said there had been a derailment, but did not confirm the cause.The NYPD said seven passengers and one crew member were taken to hospitals.AT least 20 emergency vehicles were on the scene, including police, fire, and MTA responders. All I was hoping was that I would get out of the train car safely. It was scary. I've never, this is the first time in my life and I've run MTA for the longest time and I've never experienced anything like this. I never thought I would be going through something like this. And now I'm like, I don't know what to do. I don't even know if I want to get on the train again. We were on the train and then there was a sudden jerk forward, a jerk back. Everyone started falling on top of each other and then there was just basically silent. We were in the front car so we had a general sense of what was going on since we could overhear the walkie-talkies from the MTA personnel in the front, but there wasn't an official announcement.