Use a latex balloon... inhale, exhale into the balloon, take a few breaths, inhale from balloon and hold for 20 seconds. Do that every hit and by the 4th one you'll be trying to make balloon animals with 3 heads. Note: Latex gloves work better--most balloons come out of the package really stiff and hard to blow up, but gloves have wider openings and inflate easier.
Make an aqualung out of cut up 2 liters, and use a pool or hot tub or whatever, as the water container, and fill her up, and rip, I don't know, im fresh out of the ovan as in baked right now so PEACE,
Start pulling on a bong and when it gets real milky pull the slide but dont suck up the smoke. Then have a friend put his mouth down to the female peice and blow into it as you inhale. It definitely is a bong shotgun.