An Italian, Jew, and a Polack are steel workers who always eat lunch together on the 30th floor on their curent job.

The italian opens up his sandwich and it's salami and says "After today if I get another salami sandwich I am jumping off this beam."

The jew opens up his sandwich and it's corned beef and says "After today if I get another corned beef sandwich I am jumping off this beam."

The polack opens up his sandwich and it's kielbasi and says "After today if I get another kielbasi sandwich I am jumping off this beam."

The next day they meet for lunch.

The italian opens up his sandwich and it cappicola and says "Wow, I am very happy!"

The jew opens up his sandwich and it pastrami and says "Wow, I am very happy!"

The polack opens up his sandwich and it's kielbasi again and says "That's it I have had it!" and jumps off the beam and splatters all over the sidewalk.

The jew turns to the italian and says "I don't get it... He makes his own lunch!"