Last time I was really high, I spent a good hour discussing with a couple friends how to invent a system that would make food magically appear in your mouth just by thinking about it. I literally spent an hour debating the specifics of this, such as what if you're on a diet? Then you don't want food to appear in your mouth every time you imagine it. Also, can you specify what kind of food? Down to how much detail? I mean, if I'm really hungry for a burger and a bunch of prunes show up in my mouth, I'm gonna be pretty pissed.
My first thought was "man, the guy who invents this is going to have so many law suits because of obesity".