This was one of the only films I saw as a kid. I loved it then, have watched it rather too many times since, and still get a lot out of it now. It's the best of the "make me an old dude" body-swap comedies, with a normal 13-year-old kid waking up to find he is 30, has a hairy chest and is played by Tom Hanks. It's surprisingly if agreeably dark to begin with, while a sappy romance somewhat commandeers proceedings towards the end (and never gets over its problem of a grown woman boffing a kid), but the considerable middle is tremendous fun, with Hanks' brilliant comic performance, the famous giant piano set-piece and one of my favourite jokes in any movie. "She'll wrap her legs around you so tight you'll be begging for mercy," sleazy Jon Lovitz tells Hanks, pointing at a co- worker. "Well, I'll stay away from her then!" says Hanks gratefully. The delivery is amazing.