Duncan has shared a good one (beware it does contain ‘colourful’ language)

By Carruthers via Aide-mémoire

http://w.sharethis.com/widget/?tabs=web%2Cemail&charset=utf-8&services=facebook%2Cdigg%2Cstumbleupon%2Cdelicious%2Creddit%2Cblinklist%2Cnewsvine%2Cfurl%2Ctailrank%2Cmagnolia&style=rotate&publisher=91b467b0-fcb3-4e42-95e0-1f04ad0c9be9