Attended a course (many years ago) to learn how to use carbon fibre to patch / strengthen Tornado aircraft, the first thing the instructor did was to give each of us a strand of fibre, he challenged us to brake it in two during his 20 min. intro. - the prize if you did was free beer for the duration of the course. (2 weeks!) Needless to say a room full of RAF senior NCOs went for it, big time, we failed (but he knew we would, of course!) Best thread ever!
Skipy