Professionals: never undersell yourself. An old contianership was stuck with a broken engine in the harbor of Rio the Janeiro. Nobody was able fix it. In the end they flew in the retired engineer of the ship from the Netherlands. He looks at the motor, slams it twice with a hammer and it workes as new. When asked for his compensation, he told them € 10.000. ‘That seems a bit steep, could you specify it?’ Engineer: ‘Yep; € 10 for the hammer and € 9.990 for knowing where to hit the engine.