Comment by adonovan

Years back I was an intern in a bio lab whose ultracentrifuge achieved spin rates similar to a turbopump. On its titanium head was a bar code used to regulate the speed via a beam of light. Unfortunately the manufacturer issued some with the wrong bar code, causing them to overspin and, at one lab, undergo "rapid unexpected disassembly", sending chunks of flying titanium through concrete walls. Fortunately it was at night and no-one was hurt, but the salespeople travelled out to every customer site the next day to implement the product recall.