Isaac Newton discovered it while observing an apple falling from a tree. Due to gravity, the one thing to which our bodies are physically connected on the dance floor is the floor itself. So make the most of it by utilizing lilt and dancing INTO the floor – which actually makes for a LIGHTER connection to the floor.
Another axiom of physics is momentum – i.e., a body in motion tends to stay in motion. In dancing, this is what enables a dancer to complete a turn/spin (or a 1-1/2 or double turn) on one foot after initiating momentum. For instance, a spot turn in salsa that starts with a pivot [turn] (a half turn on two feet) is actually easier to complete with faster music due to greater momentum.