I watched an old fortune-teller woman. I think it was research for a writing project of some sort. Her area of specialty was predicting the success of new relationships, and the way she divined this information was by crashing toy Matchbox cars together. She would pick cars out that were representative of the anxious couple-- he might be a Camaro, she might be a Range Rover-- and observe how (and if) they rolled away after being smacked together.