The holiday theater slate always includes classic scripted favorites like The Nutcracker and A Christmas Carol, making it easy to forget that the season also inspires some great unscripted comedy. Case in point: ImprovBoston's Holiday Spectacular, featuring some of the area's funniest and most experienced improvisers and sketch artists. The show is true to ImprovBoston's style, meaning there's no boundaries and no rules. It's designed as an alternative to your usual seasonal programming, complete with no-holds-barred laughs and musical numbers. But don't worry, it's still focused the holidays -- just the funnier, raunchier parts of the season that you might not want to repeat around grandma.