Comedy sequels are rarely a great idea. Just think for a moment and try to summon a truly great comedy which delivered a follow-up that either matched or succeeded its predecessor. You're very likely to craft a list you could count on one hand. A brilliant comedy is really lightning in a bottle type cinema, meaning it's nigh-on impossible to replicate. But when a comedy goes gangbusters at the box office, the call to try it again with a sequel usually follow fairly quickly. In a rare case of...