When Jervis puts the roast pig on the table, the punch bowl has brown liquid in it. But a second later, the liquid is pink.
When Andy and Danny are trying to get the pig, Andy says it's two against one and Danny replies that's what you said last time. This is probably referring to the season 2 episode "The Buck Stops Here", when they try to catch a goat.
When Andy and Danny enter Beans and Burger, there is no paint on Teri's hand. But when Teri approaches Andy, there is paint on her hand.
When Andy and Danny are at the drug store getting a magazine, the names of the magazines are, "Cars, Stephane Lemire's Porshe", "Rock Scene, Chris Halsen Talks" and "Super Teen, MP3 Issue". Other ones include "Teen", "Music", "Wow".
Andy: I think we can handle that. Right, Danny? Danny?
Danny: Have you noticed how the colour of these leaves is a richer green than the common shrub?
Danny: Oh, sorry. I've been spending so much time in bushes lately, I've gotten to know a lot about them.
Jervis: Hey, guys! Working hard? Oh. Oh no, that's right... you're hardly working!
Danny: "Fifty-seven ways to more kissable lips." Ooh, looks like a great issue.
Andy: What could be better than a warm summer's evening having Jen get attacked by vampiric insects?
Danny: Drinking a cool glass of lemonade while dipping your toes in a fountain?