pedorphins
Endorphins that are activated in your feet to block the pain from dancing the night away in ill-fitting shoes. Once the dancing stops, and the pedorphins wear off, you may find you are crippled for life.
Brian: "Why are you walking like a cripple? You were dancing up a storm a minute ago."
Linda: "That was before the pedorphins wore off. Now that I've stopped, my feet are killing me."
Brian: "I suggest that you keep on dancing then."