smith laughed while remembering the actions of that day , we found out the gas was a little irritating at times , but not harmful to us , or so we thought , sure the gas had no effect on us , but that was not the case for the people up top.those exposed to the gas started changing in the strangest of ways , weird things started happening to them , but the strangest thing throughout the entire event was that it only happened to a select few.some survivors were completely okay once exposed to the gas , while others however .