When the time is right all you need to do is grab your pre-folded paper, tape, and flour(or baby power) to set your trap. Open the visor and tape the "lip" to the front edge to hold it in place. Next lift up the paper to make a "pouch" and fill it with a small amount of flour. Too much will make the unit fall prematurely, and you will see what I mean when you go to actually set this up. Once you have enough flour carefully raise the paper up the rest of the way and put the visor back into its original position. Make sure to clean up any evidence of the flour. If you do this all correctly the target will never notice it up there. Now you are ready for the fun to begin.