Beardy - Which facts do you want backing up? I'll let history and just a small amount imagination do my job. If you spend your time looking back through published AAIB, NTSB and other governmental bodies' reports you'll see multiple incidents and accidents involving human factors. There are similarities and common threads running between them. Lack of perception, confusion, fright, invalid mental models etc. and so on all played their parts. Many steps have been taken to address these issues but we still have a long was to go - as this incident proves. The Mk.1 human being hasn't changed so we either adjust the environment (King Knut proved thus was difficult), the equipment (it's already in service) or the training and culture. Which is where I think I started.