"30 Crock" is a cartoon appearing in the June 2008 edition of Mad magazine (Number 490) intended to be a satire of 30 Rock. The cartoon renames the characters Tracy Jordan to Crazee Jumpin, Liz Lemon to Lizz LemonPledge, Jack Donaghy to Jock Dungaheap, and Jenna Maroney to Henna Baloney. The cartoon is generally about a decline in ratings for TGS due to its low quality and a use of focus groups to remedy the problem. The cartoon makes reference to 30 Rock's use of guest stars, Liz's "pathetic" social life (including dating a lesbian in "Blind Date") and different slogans on the trucker hats. It also derides Tina Fey's acting while complimenting her writing.