I know how to make a metric screwdriver in an emergency:


You blend 30 cc of vodka into 90 cc of orange juice.


My apologies, but it is the last day of classes for this semester here and my Latin students are all running out of the room screaming with joy, so I had to do something silly, too.


Actually, back in the '50s, the first several years of German cars did show a frustrating tendency to have slots in their screws which were too narrow for American screwdrivers, but a light touch on the grinder solved the problem quickly.