What are you thinking about?

[CCoburn]

..matter and energy tell spacetime how to curve, and the curvature tells matter how to move..this is gravity..not conventional a force. now explain how it's used for propulsion by ufo's

A conflating of theories on gravity:

1. Gravity as a property of spacetime – Einstein
2. Gravity as a fundamental force of nature e.g. gravitons

Probably just a hypothesis on the propulsion mechanism of UAPs given the manner and silence in which they move.