Scariest Invention By Nikola Tesla, Hidden from us!

It turned out that today the world knows Tesla for electricity generation, but he had also made many such scary inventions whose significance is difficult to believe. In 1896, he had accidentally converted an earth into a generator whose size was so much that it could even fit in a pocket.
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It could fit and the damage was so much that it could shake even the biggest building. When he tested this device in his laboratory, the neighbors thought that someone had said something and they came out in fear. Then Tesla took that device to someone. They set out in search of a construction building inside. On the way, they saw a 10-storey building in which workers were lowering themselves. They installed this device on the steel frame of the building. After a short scare, the workers got down from above, panicking and running away as if someone had seen them. The police were called but without telling anyone, Tesla returned his device to the system and left from there. He said that there was some fear and if this device had remained there then the entire building would have collapsed. Sameer said this. He himself said in an interview in Kabul, but the question is that how can a device the size of a pocket have such power?