High speed video (300fps/one tenth speed) of the very first fire on Masten Space Systems' new VTVL rocket vehicle, XA-0.1B. A four engine vehicle, this is engine Y+. This first test is a start abort, where immediately after starting the engine, the throttle valves are closed and the engine is shut down. The cool fireball is isopropyl alcohol being ejected from the engine and burning in air; it is expected in a start abort and causes no damage. The blast deflector was damaged during testing of XA-0.1, and further damaged by me backing a pickup truck into it. The concrete pavers are tossed off when an edge is in the flow, and you can see one break by hitting another before it even reaches the ground. We tweaked the frame, put pavers back on, and it worked fine for the subsequent tests. More information at www.masten-space.com