The 2 upper door hinges (shown in the photo below) that secure the SP-2000's 2 gull-wing doors, are removable. 
In the event of an accidental aircraft roll-over, the hinges  ( and doors) can be removed by pulling the safety pin and pushing the doors outwards, instructions for this (hopefully never to be used safety or emergency feature) are detailed in the flight manual and also on placards near the pins located  above the pilot and passengers heads.

We believe that its this sort of detailed attention to safety that sets us apart from other imports, particularly low wing aircraft that have the large clear bubble type cockpit canopies. While such canopies provide great un-obstructed visibility, they can also let in unwanted and health damaging sunlight and in an accidental roll-over, the aircraft's occupants may be left with on possibility of exiting their inverted aircraft.

With both the SP-2000 and -4000, pilots and passengers are protected by a fully welded safety cage and as described above, the doors can be removed in an emergency situation.