Marsboy's 2 stage rocket flyin' on an Estes D12 & E9 at t' Dandenong Wetlands on May 23, arrr, 2009. T' booster be quite tight into t' base o' t' sustainer and didn't drop away immediately durin' staging. This caused a build-up o' pressure and pushed t' motor mount o' t' sustainer about 2 inches into t' body o' t' rocket. T' pressure also pushed off t' nosecone. Quite a dramatic flight!