Prepare: Get your Shotguntool ready. Prepare the Puncher so that it is very sharp. Use a cord to keep the parts together. Get a Can and you are ready to Shotgun.
Use: See picture
Open the can
place the Shotguntool on the opening
turn everything 180° can bottom to the top be fast &
Prick the can puncher into the upper part of the can to create a hole