Quoted from vicjw66:

Not to mention, the extremely poor taste in joking about David Spade stepping in for Peter Griffin after they killed him off and everyone pretending the show is much better now that Peter is dead. A clear reference to 8 simple rules for dating my teenage daughter, where David Spade was brought in to replace John Ritter. Jack Tripper was an icon and he basically died on set and left a real family and television family behind. One of my most traumatic moments as a kid growing up was seeing John Ritter die in some made for TV movie about a man with a heart condition, then it happened in real life.