After sitting through hours of spoilerific, carefully-calibrated marketing presentations, there's nothing quite as bracing as the inspired lunancy of Sarah Silverman and friends. The entire cast of The Sarah Silverman Program gathered at this year's Comic-Con to share clips from their second sesaon and a tape of Steve Agee masturbating, or as the moderator, comedian Zach Galifianakis, put it "alphabetizing his testicles." (He was alphabetizing for comedic purposes, of course.) Needless to say, it was an R-rated evening all around.