Though I did not give a talk, I did participate, giving a Tip on my experiments inpainting brass mats. I even had a hand-out. It was the last thing on the last day, and since I always make droll comments during a lecture, everyone had a good time and learned something.
My old supervisor from Harvard, Brenda, gave a awesome talk about vectographs, which are crazy 3-D photographs manufactured by Polaroid. She also passed out these futuristic polarizing Polaroid glasses so that we could see the 3-D-ness of the slides she brought to share. Whenever a new slide went up, everyone went, "Ooooo!!!" We must have looked like lunatics.