For me two stand out: Martin Callahan (MEP) said "It is incredibly hard to just stand up in front of an audience of the general public (anyone could come, there was no attempt to fix attendance) and invite questions on any topic. Any slip-up would be immediately gleefully reported by the watching media. I don't want to appear a DC sycophant but he really did perform superbly." [my emphasis]
...followed by the comment from Rod Sellers:
Indeed. Also note the comment from the question-asker (and video maker) himself...and worth listening to his introduction on his own website. [RichPlanet]...perhaps worth reading more!
"Yes - very impressed with his handling. Not least in not isolating the questioner as he so easily could have done. It is often the 'off the wall' questions that reveal the real person behind the performer."