Good Samaritan bitten and choked on NYC subway

A good Samaritan was bitten and choked on the D train at Columbus Circle Saturday, in the latest off-the-rails subway attack.

The suspect was harassing a passenger on the uptown train around 5 p.m. when another straphanger intervened, police said. The 44-year-old suspect turned his ire on the do-gooder, and attacked him with his mouth and hands, according to the NYPD.