If you happen to see a large, odd looking ice cream truck speeding by you on the highway it's probably Cheech and Chong.  They aren't filming part two of Nice Dreams in which they created "Happy Herb's Nice Dreams Ice Cream", they are just trying to get to Denver as fast as they can.  Why?  That's where you will find a restaurant called the Ganja Gourmet, where they serve food items laced with pot. 

You can argue whether it's right or wrong but you have to admit it's a brilliant business strategy.  You eat the food and suddenly you are hungry again so you eat again.  The cycle never ends.  This place will never be without customers.  They might come in and never leave, but they will always have customers.