John Heffron, a winner of the second season of NBC's Last Comic Standing in 2004, is proof that you don't have to be down right dirty to get a room full of people laughing. Rather than drag his mind (and yours) through the gutter, like so many comedians do these days, he relies on random situations from his life to shape his act. This can include anything from married life to aging and other random topics. Heffron performs for Laugh for the Cure at Knight Theater on Saturday. Proceeds raised from the event will benefit the Charlotte Affiliate of Susan G. Komen for the Cure.