Yeah, and those are even the easy ones. Check out all the foreshadowing of Buster's hand with the stuffed seals and the claw games, the signs/graffiti gags ("Wee Br---ain" with Rida, "I'll get you Bluths, Hello" on the banana stand being pulled out from the water).
One of my favorite new ones that I noticed recently is during the episode where Buster has his accident, they are talking to Barry Zuckercorn (The Fonz, aka Henry Winkler) and he says he's going to burger king, and he jumps over the shark that they caught. All being a big gag on when Henry Winkler jumped over the Shark in Happy Days 
