The fifth flight of Masten Space Systems XA-0.1B-750 single engine rocket vehicle of awesomeness. Here it gets a slight case of the vapors and does what we call a "hard abort", in which it shuts down the engine and vents both propellant tanks. In off-tether flight operations this is how the vehicle would be safely crashed, if it were to go off course or otherwise lose its mind. On tether, it simply hangs out in mid air for a moment in the style of Wile E. Coyote, then falls to the end of the strap and bounces a bit.