Here are a few short paragraphs about very different people from completely different backgrounds and times throughout history.
Edward Leedskalnin was a Latvian man who in the 1920’s and 30’s single handily built “Coral Castle” in Florida. The castle is made of many megalithic stones each weighing several tonnes. The only tool that Leedskalnin spoke of using was a “perpetual motion holder”. The stones on average weigh more than the stones found in the Pyramids of Egypt. The largest stone weighs 30 tonnes, which is over three times the size of the heaviest stone found in the Great Pyramid of Giza. He was a very small man weighing less than 8 stone. He refused to allow anyone to watch him while he worked, only working at night and sleeping by day. Very few people ever got to witness him working. Some that did, reported that he caused the blocks (weighing many tonnes) to move like hydrogen balloons. Edward Leedskalnin is noted as saying that he “discovered the secrets of the pyramids”.
Ancient pre-Inca civilizations in South America built structures containing stones weighing 500 tonnes (500 family cars). Nobody has come up with a plausible explanation as to how these stones were moved. Legends state that the massive blocks were lifted by hand as if they were cork.
Thomas Castello worked at a secret underground military base in Dulce, New Mexico in the 1980s and claimed that in use there is a device known as a flash gun. This device, if pointed at an object or person, can levitate the entity off the ground and back down again.
Nikola Tesla a leading scientist and electrical engineer, who lived in the first half of the twentieth century experimented with the transmission of energy through space using magnetism. He built towers which were capable of transferring energy through space itself (rather than through a wire as we do today). When he died, the US government confiscated all of his research material, claming there were military applications for his work.
Thomas Valone is a leading modern day scientist in the field of energy and electro magnetics. He believes that the American government have secret technology called inertial shielding, which basically “hides” an objects mass (or weight), making its apparent weight tiny allowing it to produce phenomenal acceleration. He believes this technology was back engineered from alien spacecraft.
These phenomena are all very probably the same thing.