Das Bus is my favorite parody episode of The Simpsons. It parodies Lord of the Flies a book i've recently read and a very famous one. It parodies it well in that people who are familiar with Lord of the Flies will get the references and others will enjoy it as well. The Simpsons parody episodes are mostly like this such as Cape Feare which is a great episode although I haven't seen the film Cape Fear. Unfortunately 24 Minutes wasn't like this and as someone who doesn't watch 24 I saw it as a weak episode.
The episode is very enjoyable and fun to watch but the sub plot was poor and should have been removed to allow more in the main plot. I like how the characters fit in to the Lord of the Flies plot and it really worked well. But it could have been better and the sub plot drags it down to a 9.