Unstable elements are certain elements in Powder Game and Powder Game 2 that disappear quickly after start is pressed, without having to undergo a reaction with other elements to do so. Unstable elements include: Other elements such as bomb and jointbomb can also be considered unstable under certain circumstances, as well. If bomb contacts certain elements such as laser, it will disperse into dots of bomb that disappear soon after creation. The same happens if jointbomb is burnt by any lighter element.