" This point is that certain negligent acts are the result of inherent negligence, such that the very fact that a piano fell out of a 82nd floor window, or 80 jars of olive oil splattered in aisle 7 could only mean one thing, and that these unusual circumstances mean the defendant blew it and plaintiff can satisfy his prima facie case (which normally requires evidence that someone breached a duty, causing harm).The case is Manhattan by Sail, Inc. v. [read post]