Simpsons Comics #132 (2007)

At the Power Plant company picnic, Mr. Burns has another one of his near death experinces. On the way home, after hearing Otto's speakers, Burns breaks all his bones. After 6 months in the hospital, he goes to a Mexican health ranch where he is drugged and forced into sweatshop work. He is replaced back in Springfield with a double, who starts selling everything Burns owns. The real Burns puts a note in the product he is being forced to make. Over six weeks later, Homer gets the note and resolves to save his boss.