There is a quote that says, "never look back". This is very true when you are talking about moving on from something or for metaphorical purposes, but when talking in a litteral sense, it's very untrue. It doesn't matter if you are leaving your spot at the bus stop, leaving your chair at work, or just leaving in general, you should ALWAYS look behind you to see if you forgot anything. There is nothing worse then getting home and realizing that you forgot your cell phone on the table or wallet on the chair. By looking back you always get that reassurance that nothing has been forgotten.
I know this picture is from Bob Dylan's song about not looking back, but no one needs to know that, and I thought it was still a fitting/super amazing picture.