Seems like a reasonable accommodation: An employee with severe knee arthritis wants to use a four-pronged cane to perform her job on the factory floor. But one dental products manufacturer cited safety concerns and subsequently fired the woman after she ran out of company-provided leave. The U.S. Equal Employment Opportunity Commission sued the employer on her behalf and won an undisclosed settlement.
Lesson: It would be pretty difficult to convince a jury that a cane is an unreasonable accommodation in most cases.