That's a good idea Brad, thanks.
It's also true Jonathan, that some(read: most) of them will never get to the point where they start bending it. I do all of the usual stuff (including studying paintings of the old masters, and analysing shots and setups in different films & genres), but apart from being very lazy, most of the class thinks it's cool and 'real' to use available/unmotivated light in almost every situation.(and can then come up with a list of reasons why the "style" enhances the narrative, rather than looking plain undramatic and dull.) I suppose you can't 'grow' interest or enthusiasm. I think I was hoping somone had a killer exersise, guaranteed to make you fall in love with the whole 'painting with light' thing...
One of my colleagues said: "Don't worry about it too much man, if these kids don't WANT to succeed, it means more work for you..."
Guess he has a point.