Idk what you mean thrust against, but there's always equal and opposite forces. Say you were floating in space and were holding a hammer. You throw the hammer away from you. You will also move away from the hammer as it moves away from you (albeit at different speeds relative to each object's mass). The conservation of momentum.

https://youtu.be/Fp7D5D8Bqjc?si=KyIr0doj2Pinf6U5