Launched as a 2-stage rocket, usin' t' booster stage from our old Taser Twin. Arrr! Since t' Wizard wasn't designed or built as a 2-stage rocket, I believe thar was a gap betwixt t' sustainer motor and t' engine block inside t' body.  When t' rocket staged, arrr, t' sustainer lept across this gap and slammed into t' engine block, arrr, causin' t' main stage t' corkscrew at altitude.