Number of characters: 2
One character is sat at a bench and the other walks over and then sits on the bench next to them.
One of the characters is sat on the bench, waiting for a box/briefcase/folder that contains money. The other character walks up to the bench, with the briefcase, and then starts talking to the other character. Eventually they open the box/briefcase/folder and the money is not in there. The one character demands to know where the money is, and threatens the other with something unless he comes up with an explanation. The other character refuses to tell him, until the threats get worse. And then he explains that the cash was taken by someone else who was doing a deal with him.