I offered to shoot a promotional video for a band that a friend of mine is friends with. The other night, I met the guitar player who as it turns out has been designing video cameras for the last 20 years. Mostly in the video conferencing and medical products space, but he knows all the problems associated with sensors, optics and various supporting electronics.
I felt bad for him later because I geeked out on him like he was a rockstar and made him talk about digital camera design until the show started.