I’ve done it a couple of times and always found a photo or two of the bride/groom when they were kids, especially if they looked proper weird looking, always went down well…….another time I blew up a picture of a mates tattoo which is truly the worst tattoo in the world and got everyone taking the piss out of him………if that doesn’t get a laugh then start coming on to the the chief bridesmaid……double points if she’s a minger