Some victims of the Tokyo subway sarin attack in 1995 who were exposed to low levels of the gas reported that they initially thought an eclipse of the sun had occurred, because everything looked dark ...Some victims of the Tokyo subway sarin attack in 1995 who were exposed to low levels of the gas reported that they initially thought an eclipse of the sun had occurred, because everything looked dark when they came out of the station. In the Tokyo subway sarin attack, many lives were saved once medical personnel realized the identity of the poison gas and were able to administer atropine, an antidote that blocks the binding of acetylcholine to its receptors.