SpaceX's Crew Dragon Spacecraft completed a pad abort test in May, 2015. This image shows the vehicle's eight SuperDraco thrusters firing as intended. (credit: SpaceX) During a series of engine tests of SpaceX's Dragon spacecraft this past Saturday, the vehicle experienced what the company has characterized as an "anomaly." Based upon an unauthorized leaked video of the accident, the company was counting down toward a firing of the Dragon's SuperDraco thrusters when the vehicle exploded.