It's all done with mirrors. A reflection of your right side can appear to be your left side. With this Snack, you can appear to perform many gravity-defying stunts. It is important to get a good, flat mirror, since distortions will ruin the effect.
Plastic mirrors are expensive, but glass mirrors can be dangerous.
Look in your local yellow pages for a nearby plastics store. A length of 2 x 4 inch wood and a router tool, or ring stands and clamps, This makes a stand to hold the mirror upright. A sturdy table on which you can stand. Use a router to cut a groove that is just wide enough to slip the mirror into. To help stabilize the mirror, you can nail some scrap wood to the ends of the board.