Dave Ross talks with Gabi Zijderveld from Affectiva about the company's Affdex technology, which can instantly detect the emotion you're experiencing by analyzing your face. You can try it out yourself - they have a free app called AffdexMe - and they're working on building this into cars so you could get a warning when you're too tired to drive ... or getting road rage. This longer interview is full of fascinating information that didn't make it on air: ever heard of video games that change based on your interest level?