So you're at a wedding, the bride (beautiful) drags you by the hand into a room where a bunch of people are sitting around listening to bods play the guitar. A yamaha accoustic is thrust into your hands with the call of 'You play the guitar Matt'. But the groom and some musically talented guy are already sat down playing Crowded House, about 100 million miles away from anything you actually know how to play ...
... what tune do you crank out?
P.S. there is a video camera, your wife is watching and you have drank 9 pints :)