Mensah had set a survey perimeter, marking all the areas the aerial scan had flagged as hazardous or potentially hazardous. I checked on everybody again and saw Arada and Ratthi heading directly for one of the hazard markers. I expected them to stop at the perimeter, since they’d been pretty consistently cautious on the other assessments. I started moving in that direction anyway. Then they passed the perimeter. I started to run. I sent Mensah my field camera feed and used the voice comm to say, "Dr. Arada, Dr. Ratthi, please stop. You’re past the perimeter and nearing a hazard marker."