"Yes, I understood you Jamal".

You tell him: "Yes, I understood you Jamal. I'll take your $ 50 and go to the Old Oak grocery store and buy Jamal for the entire $ 50 beer."

You go to the Old Oak grocery store to buy a full $ 50 of beer for your black student dorm roommate, Jamal. You keep $ 50 in your pants pocket. However, almost at the door of the store some black guy runs up to you and pulls 50 dollars from your pocket. After that, this black guy quickly runs away from you through the adjacent alleys. You couldn't catch up with him (obviously he knows the area better and can run better).