Two down-on-their-luck guys decide to fake their owndeathsandstart over with newidentities, only to findthepeoplethey're pretending to beareineven deepertrouble.
He might test a range of incentives on food servers to determine how best to motivate customer drink orders without driving the servers to be overly pushy, or evaluate which of several potential incentives might make first-time visitors downontheirluck more likely to return.