From the Buzzfeed article about AD Halls:
Back in February, crew members also walked off the Georgia set of another low-budget production where Halls worked as assistant director, One Way, because of what they said were unsafe working conditions and lack of pay. Angela Schroeder, a set decorator, told BuzzFeed News that the final straw was the last night, when Halls decided to do a spontaneous shoot at an active train yard because the production company had not properly secured any locations. The assistant director had all of the crew working within 30 feet of at least eight dark train tracks in the middle of the night, without spotters, she said, adding that “nobody knew what they were doing.”
A "spontaneous shoot" at an active train yard at night, presumably without permission? Words fail me.