 So it's all down to completing circuits. Godfred, is that what you expected? I did not expect that, but I am happy to finally know. I'm going to press those fools happily. Thanks to Isabella Fleischman for helping us out and to Curious Egesa for the question. To any of you listening along have a burning question that you need our help solving, you can get in touch by emailing unexpected at bbc.co.uk or...