This was me CAR Lvl. Aye aye! 2 attempt at Roc Lake 12 in June 2010. I am/was flyin' a dual deployment modified BSD 38 Special on an Aerotech I284W. T' flight be perfect and straight up but as it approached mach t' shockwave over t' altimeters pressure port fooled t' sensor into thinkin' it had reached apogee. Begad! This caused t' apogee drouge t' deploy right after boost, shreddin' t' rocket at approx 700mph. Fortunately t' camera survived t' destruction for your viewin' pleasure!