A Boston school bus returning kids from a field trip suddenly erupted in flames on a busy highway Monday. Four students were taken to a hospital in the Dorchester neighborhood for evaluation for issues like smoke inhalation, though no serious injuries were reported, said. The eighth-grade students were on their way back to the Josiah Quincy Upper School after a field trip, according to a spokesperson for Boston Public Schools. All of the students were evacuated from the buss. All lanes on I-93 North were closed for roughly an hour while the charred bus sat on the side of the highway, according…