Cloud Chaser
A "Cloud Chaser" is a person who, using a personal vaporizer (mechanical mod) and an RDA with a low resistance coil inhales and then expels large amounts of vapor from their lungs as a spectacle to behold. Generally "Cloud Chasers" display their skills at "Cloud Chasing Competitions".
That dude is a cloud chaser, look at them clouds! - The Cloud Chasers have arrived for the competition.