My short-sighted mate Greg dropped off one night under his umbrella, having taken his glasses off. I was awake at first light, in time to hear his scream and see the whole brolly quake nad him emerge white as a sheet. He put his glasses on, and looked much better. He said he'd woken to see a huge pterodactyl flying toward him over the horizon. When he got his glasses on, he realised it was an earwig on the rim of his brolly...