Petunia calmly replied, "The preliminary report suggests that a canister of hydrochloric acid failed and began reacting with the air to form the gas cloud. They also detected traces of cyanide gas in the air as well. Professor Sciuto’s emergency system immediately kicked in to vent the room’s contaminated air and sound the alarms. While you were unconscious, you and your belongings were scrubbed clean to remove any vestiges of the acid."