I have a dual monitor setup and have been spending a lot of time doing 3D CAD in AutoCAD 2011. After a couple of hours of working on a project that has a lot of small pieces which must fit together precisely, I switched over to a web browser window and found myself trying to grab and rotate the view of the window, as if it had a "back side". For those who've used AutoCAD, it's when you're holding down shift and the mousewheel at the same time to rotate your view… I'm accustomed to holding down the mousewheel for scrolling up/down pages in browsers and other software, for a minute my brain short circuited because nothing was rotating.
"Bicycling is a healthy and manly pursuit with much to recommend it, and, unlike other foolish crazes, it has not died out."
- The Daily Telegraph (1877)