The mutagen monster was created by two cows. At the end, four cows come out of the university after the mutagen monster is defeated.
When April starts to make the report about the two trains that crashed and derailed in the railroad yard, She states she's reporting live from the downtown railroad yard. New York City doesn't have a downtown railroad yard and April was being vague on the exact railroad yard location where the train derailment actually took place. A professional reporter would specify more clearly which railroad yard and most likely the city where the incident took place.