Hackit Company makes and sells table saws, which are designed to be safe if properly used.Robert buys a Hackit saw and lends it to his neighbor Sam.To reach a toolbox on a high shelf , Sam props the saw at an angle against a cabinet and climbs onto the saw.He loses his balance, slips off the saw, falls on the blade, and is injured.Sam files a product liability suit against Hackit, on the ground of negligence.

On what basis, if any, could Sam prevail?