If you have gas trapped inside your stomach and need to fart to relieve the gas buildup in your stomach here's what you can do to make yourself fart and relieve that gas.
Kneel down and put your hands in front of you on the floor.
Then lift your butt into the air so that your legs and arms are fully stretched.
Next slowly inhale deeply to flatten your chest and then hold it for a few seconds to help push out the trapped gas from your intestines and If necessary, give a little push to help yourself fart.