We all make them. Some more than others. That's what I thought about
when I saw this little animation on YouTube. Thanks to John Tabor's
blog for the link.

Non-pilots will probably get a chuckle. Pilots may have a different
reaction.

http://www.youtube.com/watch?v=sdUUx5FdySs

Marco

Apologies if this has been posted already but I couldn't find a post
with a quck Google search.