Evil Bong (2006)

A group of stoners inhale more than they bargained for when they smoke from an evil bong in this campy comedy. The guys buy a vintage bong named EeBee from an ad in High Times magazine, but they have no idea the possessed pipe will gradually suck them into a horrifying surreal world. As they fight for their lives, EeBee's former owner (none other than Tommy Chong) -- the only one who understands the power of the bong -- tries to rescue them.