The B&M flying coaster restraint system is unique in that it consists of pins extending from either side of the harness that extend into a ratchet system on either side of each seat. When the train is downloaded (all the people are off) and the next group is on, the operator presses the "latch harness" button which partially extends these pins so the restraint can be tightened, but not released (The ends of the pins are angled to allow for this). As the attendants are checking each row, the operator can select rows they've already checked and press the "lock harness" button, which extends the pins about an inch on each side to secure the restraint so it cannot be moved up or down. The PanelView screen shows each seat and whether the pins have successfully extended. If not, the operator calls out the seat number and the attendant basically gives the restraint an additional push so that the pins can fully extend. Of course, the train can only be dispatched once all seats are shown as "locked", unless they are bypassed by maintenance (as you can see is the case with row 2 seat 4)