They derive from acrobatics which date back well in the B.C. era. One or both partners are closer to the floor, or ceiling than usual. More acute sensitivity, partner awareness, and trust are necessary.
Throws constitue a whole other level of skill, and are definitely for stage-only.
We urge you to respect these rules. California swing clubs seem to considerably more liberal in this respect than clubs in the Northeast. Concerning Lifts etc. Fitness Coordinator Bert Adams.