Tommy comes back off his holiday with his mum and his step dad and the teacher asks him… “Hello Tommy, did you enjoy your holiday?” … … … “I did Teacher” … …. “And did your stepfather take you out, show you things, go exploring?” … … “Yes he did teacher, he took me out rowing 1/2 a mile into the lake every day, and then I’d swim back.” … … … “Oh, well, um, it’s an awful long way to swim isn’t, 1/2 a mile?” … “Oh no teacher, no, it was easy once I’d got out of the bag!”