When Mr. Burns is caught illegally storing excess nuclear waste, he's forced to award the town $3 mllion.  Traveling salesman, Lyle Lanley (Phil Hartman) convinces the town to spend the money on a monorail.  Homer becomes the conductor, but Marge is not convinced and investigates another town Lyle sold a monorail to.  When she sees how he ruined that town and that he's a con man, Marge rushes back to Springfield but it's too late.  The monorail is out of control and won't stop... until Homer throws out an anchor to save the day.