I mentioned this to some of you before. This was a BBC documentary on how to build a jumbo jet engine and I thought it was very good at showing the level of QC that goes into the design, construction and operation of some products such as a jumbo jet engine. As part of its design the housing for the jet engine must remain intact and contain all parts of the engine in the event of a catastrophic event such as a bird strike. In order to prove it will the company (Rolls Royce) must build a fully workable jet engine and then destroy it (from 39mins 54secs). You can watch the full video below: