I know we had this discussion a while back but just saw an example yesterday.

I am walking through the shipping area at my "real" job and see one of the workers rubbing something briskly across the palm of his hand. He either had the mother of all itches or something more clever was going on. Next to him on the table was a metal box cutter, taken apart and he had the single edge razor blade in one hand, briskly stropping it across the heel of the other hand.

So, where did he learn this? He is an El Salvadoran immigrant speaking minimal English so I was unable to get much in the details but obviously he was no stranger to what he was doing.

Tony