Closeup o' rocket fire in high speed, with a bit o' a startup transient. T' pulsin' at t' end be t' purge gas pushin' t' extra propellant in t' lines out. T' rocket is hinged and is commanded t' move slightly. Blimey! T' mach diamonds are a bit ugly because thar was some minor throat damage early in t' engine's life. 300 frames per second' played back at 1/10th speed.