I thought the part right after Eliezer finds his notes was the best reply to the topic, and I particularly liked the smallpox comparison. Could have been better focused in general, as there was a lot of things that were a bit off track, but I feel it was worth watching on the whole.
Also the random flashes to Eliezer's facial expression while PZ is talking sent me into hysterics for some reason.
There was a weird ominous noise when that happened, twice!
The video archive of the talk is available here
https://www.youtube.com/watch?v=Pm-5s__aZE0