The first one was a talk from 4:00-5:00, entitled "Sense from Chaos: Controlling the Dynamic Networks of the Brain" by Larry Abbott of Columbia University. The talk was excellent. Once again, I asked a question; what's the function of sleep? His answer... "We have no idea". I don't think that's quite true, but I was happy to hear that there is so much yet to be discovered in cognitive neuroscience.
The second event I went to was the Science in the Pub panel discussion "Who Am I?" They talked about memory, consciousness, identity, illusions, and all sorts of interesting neurological phenomena. I was especially pleased when Prof. Abbott referred to my earlier question about sleep; the panel discussed sleep and dreaming for quite some time.