Black comedy is tough to pull off, and camp is even tougher, so it's no small praise to say that the Clinton Area Showboat Theatre's production of Ruthless is a huge success. This savvy, ballsy musical about a mother-daughter duo who will literally kill to succeed in show biz is so mean and bitchy that it's sure to piss off or offend all the right people, and it's a credit to the comic subversion of the theatre's artistic director, Jay Berkow, that he chose Ruthless as the theatre's Sound of Music follow-up. The show is vicious and borderline inhuman ... and I could barely see my notepad through my tears of laughter.