Launch o' a Madcow Super DX3 on August 10, 2013 at t' Tri-Cities Rocketeers club launch (Pasco, WA), shiver me timbers, Cesaroni motor. Motor burns normally, then extinguishes, then over-pressures blowin' out t' side o' t' casin' removin' a fin and causin' t' spiral flight. Blimey! Remainder o' t' flight normal dual-deployment. This is nay me rocket.