The "poor fat bastard" killed in the film's opening shows up again as the zombie "with a pretty mouth" that Tallahassee kills with a banjo in the supermarket.
In the first scene with Columbus when he fiddles with the keys trying to get his car door unlocked while being chased by zombies, when he decides to take them for another lap he drops the keys on the ground however when he is running away we can see that there are no keys on the ground.
When Columbus and Tallahassee first get the hummer, the road that they are seen driving on in Texas, is the same road the entire group is seen driving on just as the pass the sign that says "Welcome to California."
Columbus: The plague of the 21st Century, remember mad cow disease? Well mad cow became mad person became mad zombie. It's a fast acting virus that leaves you with a swollen brain, a raging fever, makes you hateful and violent and leaves you with a really bad case of the munchies.
People living outside the United States (Australia or Denmark for instance) might not be familiar with Hostess Twinkies. A Twinkie is made up of soft, yellow sponge cake with a creamy white filling inside. A photo of a Twinkie can be seen here.
Q
Is there a scene after the credits?
A
Yes, you get about 30 more seconds of Bill Murray. He and Woody Harrelson quote from Caddyshack (1980).
Q
How much sex, violence, and profanity are in this movie?
A
For detailed information about the amounts and types of (a) sex and nudity, (b) violence and gore, (c) profanity, (d) alcohol, drugs, and smoking, and (e) frightening and intense scenes in this movie, consult the IMDb Parents Guide for this movie. The Parents Guide for Zombieland can be found here.