The Simpsons opening sequence is a callback to the film. Bart writes "I will not wait 20 years to make another movie" on the chalkboard and skateboards through Springfield, which is still recovering from the dome incident. Several movie characters reappear, including president Schwarzenegger, the Multi-Eyed Squirrel, Colin, Russ Cargill, and the Medicine Woman. We also see that the Simpsons' house is still under construction and the silo is strapped to Homer's car. Plopper the pig is also featured for the first time in the series, during the couch gag and Homer refers to him as "my summer love." A special opening sequence, featuring
50-cent piece (Canadian coin) 50-cent piece (Canadian coin) The fifty-cent piece, also referred to as the half dollar (), is the common name of the Canadian coin worth 50 cents. The coin's reverse depicts the coat of arms of Canada. At the opening ceremonies for the Ottawa branch of the Royal Mint, held on January 2, 1908, Governor General Earl Grey struck the Dominion of Canada's first domestically produced coin. It was a silver fifty-cent piece bearing the effigy of King Edward VII. Though it is regularly minted, it is not made in large quantities (approximate annual average production of 150,000), and since 2004