Bart and Milhouse have to remain inside The Simpsons house when an ozone hole moves over Springfield. The two dress up as ladies and jump on the bed, singing "Sisters Are Doin' It for Themselves". When Homer comes in abruptly, Bart falls off of the bed and lands on one of Homer's bowling balls and breaks his coccyx. Dr. Hibbert informs Homer and Marge that Bart will have to use a wheelchair until the bone has healed. When Bart arrives at Springfield Elementary School the following day, he finds that he cannot enter because the school lacks ramps for the disabled. As Principal Skinner considers a ramp for the school, mafia boss Fat Tony emerges and suggests that his construction company would be a good choice of company to build it. Although the new ramp system almost immediately collapses (due to it being made out of bread sticks), Fat Tony informs Skinner that the construction supposedly cost US$200,000 and that the school will still have to pay. In response, Principal Skinner decides to close Springfield Elementary due to lack of funds (having used them to pay off Fat Tony and thus avoid brutal mob reprisals).