So the other day I was commenting on a blog where the authors were working on a new layout.  I spotted some strange wrapping issues and uploaded a screenshot of my browser window for them to look at.  Repeatedly, whenever the screenshot was on the screen, I caught myself trying to click the browser's back button in the screenshot.  Needless to say, each time I did this was followed by a disjointed moment of confusion where I wondered why it wasn't working.  Is my browser locked up?  What's going on?  After a second or so the realization would come.  You dummy, that's not your browser, that's a picture of your browser.

I think it served as a reminder of how much we do automatically once we've "learned" to do it.  The entire metaphor--hand to mouse, mouse to cursor, cursor to back button, click--all automatic and interpretted by the brain as "go back".

Anyway, next time I upload a screenshot of the browser, I think I'll leave the menu and toolbar out of it.