Zombillies is the third episode of YFMTS.
Plot
While critizing Benatar's music, the bus breaks down and the band comes upon "zombillies" as they try to fight them off by using Benatar's music and then the zombies tear themselves apart and then the band drives off.
http://www.youtube.com/watch?v=F3YV6abbLrs&feature=mr_meh&list=ELTRLjsbqdEqo&playnext=0