A good choice for knitters who tend to knit too tightly - the slippery metal surface can help to loosen the tension.

For the uninitiated, washboards are used to clean laundry, and typically have a wooden frame surrounding a rippled metal surface.

You soak clothes in soapy water, then rub them against the metal surface to scrub the fabric.

Luckily, she was not touching the metal surface and escaped severely shaken but unhurt.

With the help of a frying pan or other metal surface, however, culinary enthusiasts have long been attempting to make sun-cooked eggs.