From time to time we all get in the routine of making the same motion over and over as we carry about day to day business. One of those routines for me is passing my right hand across my desk and down to the trash can immediately to my right.
Just a few moments ago I was speaking to someone through the telephone. After our conversation I made said motion and just about tossed the receiver into the trash can before saying to myself, "That doesn't belong there."
It's probably a good thing I haven't spent much time in the office today.