Jem Stansfield builds a vortex cannon to pick up where the big bad wolf faile...
Bang Goes the Theory
Season 1 Episode 6: Helicopters
Jem Stansfield takes to the air with the Royal Navy to explain how helicopters work, while Liz Bonnin puts brain training devices to the test. Dallas Campbell investigates the new space entrepeneurs in California, and Dr Yan Wong shows how to melt glass with a microwave.