Chocolate giants Cadburys claim that their Curly Wurly is 'the bendiest, stretchiest chocolate bar in the world'. But are they telling us the truth? Nice Mum attempt to find the world's most flexible chocolate bar in this daft scientific quest. They discover which chocolate bar Uri Geller can bend with his eyes, try and start a corporate war between Cadburys and Nestle and attempt to involve England football captain David Beckham in their ridiculous scheme.Author Kris Dyer. Author Dave Marks.