Split ribs into 4 equal parts, and place into Ninja Foodi pot with water and apple cider vinegar. Secure and lock pressure cooking lid on Foodi, and turn valve to 'seal'. Set Foodi to 'pressure' cook on high for 30 minutes. Allow pressure to naturally release for 10 minutes before quick releasing the rest of the pressure by carefully turning the valve to 'vent'.
Using silicone tongs, remove the ribs to a tray or plate and brush with half of the barbeque sauce. Discard the cooking liquid from the Ninja Foodi pot and wipe dry before returning pot to Foodi.
Place wire rack into Foodi pot and place ribs on rack in single layer. Set Foodi to 'air crisp' at 400 degrees Fahrenheit for 10 minutes.
Brush ribs with remaining barbeque sauce and serve!
Instead of actually discarding the cooking liquid from this recipe, you can add it to some mashed potatoes, stir it into a soup or gravy, or use it to add a savory touch to a variety of different dishes!