This entry into EMRRs video contest is composed of onboard video from my rocket named Trebuchet, a clustered and staged black powder powered vehicle.  Initial boost was provided by a central Estes D12, two A8s and two C6s.  The sustainer was powered by one E9.  The initial dizzying spin was the product of canted booster fins, a safety feature in case one of the outboard engines failed to light.  The secondary spin of the sustainer was believed to be caused by slag buildup seen in the nozzle throat.  Sorry, no music and the video editing isnt up to pro standards but I hope you enjoy it. http://www.rocketreviews.com