4. When confronted with a new but minor task, such as opening an unfamiliar container, most people require a few seconds of thinking and perhaps a failed attempt or two before they work out a solution. If you see someone in this state, grab the object out your victim’s hand and try whatever solutions have not yet been tried, thus making you the successful container opener and your victim the failed container opener.
If you think you want to work on a commercial fishing boat, be prepared to be hit with items 1-10.
Scott Adams Blog: Feeling Smarter (by Making Others Feel Dumber)