This was a 3500 lbf hybrid rocket motor static test fire located about 25 miles north east o' Majove in t' Antelope Valley in southern california. I was just a spectator t' this test, shiver me timbers, so I don't know very much about it, but what I do know is that it used peroxide and HTPB. Aye aye! T' fluxuations within t' test are throttlin' o' t' motor. Its nay any instablility within t' combustion. Well, blow me down! Marshmellows anyone?