Nasrudin at the granary

Nasrudin got a job at a busy granary, loading sacks onto trucks 
to be taken to market. The foreman, who was keeping an eye on the 
workers, soon came over to speak to him.
 "Why is it that you carry only one sack at a time while the other 
workers all carry two?" asked the foreman.
 Nasrudin looked around and said, "I suppose that they are too 
lazy to make two trips the way I do."