In one episode, Frank says to Al, "I got an idea! Why don't we hide the lines around the set? I hear that they do that on Dallas all the time." This is a reference to Patrick Duffy's old show Dallas (he played Bobby Ewing)
That come out wrong.
In the opening credits the amusement park is intended to be in Wisconsin on the shores of Lake Michigan. However at the end of the credits the body of water can be see to have rather large waves on a calm day. These waves are much too large for Lake Michigan in the absence of a storm.