Smithers (is serving as Homer's personal assistant) asks Homer what exactly he does at the plant. His response is what George does on The Jetsons. Later when his chair is spinning out of control, he cries out "Smithers! Stop this crazy thing!"
In Chief Wiggum's dream of being a cop in the future, he and his partner Officer Cornelius pull George Jetson over for ejecting his son from a flying vehicle, even though George protests that he was dropping him off at school. George's protest is a reference to the opening sequence of the TV series, where George does indeed drop Elroy off at school by ejecting him (safely, in a floating bubble) from his air car.