How does Jackson's dance tilt 45 degrees?

Many people may think that it is hung by steel wire, but it is not. I saw a program about the legend of Jackson's life, and a document in the program revealed this suspense. In fact, Jackson invented a special kind of shoes (designed by Jackson himself). There is a porch in the shoes and something similar to a hook on the stage to fix the shoes. In addition, Michael Jackson has been exercising (a 45-degree tilt requires a strong waist strength). Therefore, when performing a 45-degree tilt on the stage, it will make people feel dazzling.