So, you don’t understand the joke, but you detected an excuse to say America Bad. Your employer must be pleased.

The joke of this comic is based around most units in both the metric and imperial system being fairly mundane quantities. A one meter long stick is about half the height of a man, a one pound rock is about the size of his fist, a one volt battery has the potential of a dead AA.

The Ferad is the SI unit of capacitance, equal to 1 coulomb per volt. A one ferad capacitor can hold enough energy to do a number of exotically dangerous things.