text: In the sense that gravity is defined as the force of attraction between two bodies, due to their mass, i.e.\n\nF = gm1m2/d^2..............(1)\n\nit would seem that there are only a few ways in which this force could become negative (i.e. repulsive rather than attractive).\n\n1. If there was a universe where g, the universal gravitational constant, was negative rather than positive (not in our known universe).\n\n2. If ONE of the masses was negative (again, not comprehensible in our universe).\n\n3. If the distance between the masses was imaginary. (again, not evidenced in our universe)\n\nSo, it would seem that anti-gravity would violate our current theories.\n\nIn answer to your question, however, no, I have not experienced anti-gravity with the Levitron. Besides it is NOT anti-gravity. Gravity still opposes the force generated by the Levitron, in balance with it.