Japan’s transportation ministry conducted tests to see whether the hybrid vehicles are likely to shock humans in case of an accident.

They found that it is possible for high-voltage batteries to to conduct an electric shock through the car’s body when an accident occurs.

Firefighters in Tsukuba City, about 40 miles northeast of Tokyo, conducted training for dealing with hybrid car crashes. In case of such an accident, it is important take care not to touch the vehicle without protective material.