Collateral A man walked into a bank and asked to borrow the sum of 2,000 dollars for three weeks. The loan officer asked what collateral the man had. He replied: “I’ve got a Rolls-Royce. Keep it until the loan is paid off. Here is the key.” So the loan officer arranged for the car to be driven into the bank’s underground parking for safe keeping and gave the man the 2,000 dollars. Three..