Step 6: The Reveal
Now comes the hard part. Using the tip of a knife, pull up the edge of the template. It should release from the pie without much effort. Continue pulling up the template, working evenly from both sides towards the center. The excess graham cracker crumbs will probably stick to the cooking spray on the top of the template, as long as there aren't too many, but do try to be careful not to spill them where they shouldn't be.
Lastly, we'll add a decimal point to our π. Dip the end of a drinking straw into a dish of graham cracker crumbs; you want to pick up enough crumbs to make a dot, but not so many that the dot will overflow into the rings. Keep the crumbs from falling out by covering the bottom end of the straw with a finger, then position the straw over the pie between the 3-segment ring and the first 1-segment ring. Remove your finger, letting the crumbs out.
Refrigerate the pie for a few hours or overnight, then serve and enjoy!