The Down Gas is a green mist technique that causes living things to lose the feeling in their arms and legs, It was created by Dr Gero . when he's extends his both of his arms and hand and shoots the green mist from the palm of his hands at the opponent , the opponent becomes paralyzed. While battling Android 18 and Gohan, Dr Gero Used the Dowa Gas to paralyze the two fighters. Dr Gero Kidnapped 18 and Gohan and had them both strapped to chairs.