Never My Fault: Bart tells his mother that the reason his arm got dislocated was because some kids from Ogdenville dared him to perform a risky skateboarding move, despite the fact that the incident was a result of him trying to show off in front of the newcomers. Homer also blames the Ogden's liquor for costing him his job.
Oh, Crap!: Homer when he finally realises he has food poisoning and is about to be sick because the Mother Nature burgers were tainted. Then again when he vomits into Lisa's saxophone and can't get his mouth off the end.
Rule of Three: Two in quick succession. Homer's stomach rumbles three times before he realises he has food poisoning. He then tries to find a bathroom three times, only to find all three occupied (Marge in the downstairs bathroom, Bart in the upstairs bathroom, and Lisa in Homer and Marge's en suite). So he decides to vomit into Lisa's saxophone instead.
Take That!: Itís obvious that the episode is a take on America's immigration issues.