To be honest I wasn't such a fan of this episode. It was funny but it never really stuck with me. But despite that, it has a very, very funny moment as they take one of their new creations to a wind tunnel.
They challenged themselves to make an electric car which didn't suck. They decided that it couldn't be better looking than the Tesla - it was designed by Jeremy after all - but it was fast, easily beating a G-Wiz off the line! That's probably down to the fact that Jeremy used Citroen 2CV tyres to reduce friction. Somewhere this logic makes sense....
What they named the Hammerhead Eagle i-Thrust, didn't perform too well in the wind tunnel, sliding across from one end to the other, but it was before this test, the funniest part occurred.
Jeremy, saying he'd call Hammond, pressed a button named 'retard'. Hammond swiftly joined them and both James and Clarkson struggled to keep in their laughter. Although 'retard' technically means 'slow', so I don't think it was working. It called the wrong person!