Nerdballs & a heavy toy pig dropped and the Nerds had to figure out how many glass sheets each object would break. Danielle, through the aid of My Little Pony fans (?) and 9/11 Truthers (!) across the Internet, won the individual Nerd-Off, being the only Nerd to get two predictions right.
Danielle won immunity and the right to choose one Nerd for the Nerd-Off.
Moogega offered herself to be sent to the Nerd-Off, which was probably the best thing to happen to Celeste. Danielle, who has been frustrated at Genevieve, picked Genevieve as she changed her mind from selecting Celeste. All the Nerds voted for Moogega.
Genevieve stacked her way to victory in the Nerd-Off against Moogega by having the higher freestanding structure. The camera angle made it hard to see the margin of victory. Genevieve has won 3 Nerd-Offs so far.
My favorites in order to win:
Danielle as the wild card
Celeste as the underdog
Also, I'd found out a few hours ago that the male assistant who appears in a few episodes is Lou Ferrigno, Jr.
I think it was more of a "hey, look, it's GWB" joke vote for most people. It's like when there's a survey, and there are 3 serious answers and one joke answer, the joke answer gets the most votes most of the time.