I just had one of those 'what the hell are we doing' moments.

We don't necessarily stand by our faults every time, but we will always stand by our methodologies and ethos.

Back when I was a professional model-maker at Industrial Light & Magic, my specialty was hard-edged construction - spaceships, miniature sets, and architectural stuff. These objects were sometimes just 12 inches across yet needed enough detail to fill a movie screen.

After all those years of doing remote detonations, where we just push a button and something explodes, to actually see a nice big fat line of black smoke heading toward something that will blow up is very satisfying.

Audiences of critical thinkers are my favorite kinds of audiences. There are jokes I tell in the show that don't get laughs unless I am in front of an audience of critical thinkers. Put me in front of a crowd of science teachers or astronauts! The guileless aren't our audience - it's the critical thinkers we love.

We didn't set out to be educators or even scientists, and we don't purport that what we do is real science but we're demonstrating a methodology by which one can engage and satisfy your curiosity.

The difference between screwing around and science is writing it down.