On Hitler's birthday, he decides to have three Jews brought to him. When Himmler approaches with the first Jew, Hitler asks, "So, Jew, how high can you jump?"
The first Jew is kinda surprised by the question, and stammers, "Uh, one meter."
"Ah, gut, gut," says Hitler. "Then since it's my birthday, I will give you one sandwich."
The Jew, eyes gleaming at the sandwich Goebbels brought, goes back to the camp.
Himmler brings the second Jew.
"So, Jew," asks Hitler, "How high can you jump?"
Having seen the first Jew's response and the reward, the Jew says, "Two metres, Herr Hitler."
"Ah, ganz gut!" says Hitler with a grin, "Then for my birthday, you can have two sandwiches!"
The Jew is sent back to camp, rolphing down his sandwiches.
Of course, by then, the third Jew's figured out the system.
"So, Jew," Hitler asks when Himmler presents the third. "How high can you jump?"
Proudly, the Jew proclaims, "Four metres, Herr Führer!"
"Shoot this Jew, he can get over the wire!"