I've now found my favourite quote from the show. One member of the build team, Tory Belleci, is joking around in advance of possibly launching his coworker Kari Byron into San Francisco Bay with a water-bottle rocket. When she's a little upset, he quips:
Kari's too nervous. No more joking. Let's grim up.
Grim up. A great expression I hadn't heard before. The stunt ended up being too dangerous, so they launched a dummy instead.