Eugene Podkletnov showed that if you make a 500 kilovolt electrical discharge through a helium filled chamber: you can literally control gravity.
SAUCE
https://archive.org/details/SecretsOfAnitgravityPropulsion/page/n171/mode/2up
SAUCE
https://archive.org/details/SecretsOfAnitgravityPropulsion/page/n171/mode/2up
