Moving from friction between people to my friction research was a welcome transition. Many in my audience had not been exposed to much physics, so I kept the friction science light. The photo below shows me discussing some friction basics (click on the image for a larger view).
The room was a dark and a colleague was kind enough to grab a photo with a cell phone. I was happy to receive a photo. I got some great questions after I finished, giving me more to ponder. There is always more to learn!