I was recently exposed during a Work related 'Customer Services Training' to these videos in the US airline industry.

http://www.youtube.com/watch?v=r1rsVloe0KA

http://www.youtube.com/watch?v=DYA_ivyj3kE

I personally would have had to get up and leave at this point if on that aircraft. It doesn't inspire confidence that aircrew wasn't rolling one up in Cockpit.

Lack of a Personal Small pen Knifes or one kept within hand luggage would have been the least of my worries.