Some carriages have a moveable seat called a "jump seat". SA102 options included wing tip tanks and a third jump seat. Dvorak sat in the cockpit's jump seat for landing. Lieutenant May was riding on the jump seat behind the Jeep and survived the crash. The driver's door provides access to the driver's cockpit, and to the rear jump seat. Some cars have a jump seat that folds up to provide space for wheelchair-bound commuters.