Kinda obvious to me though likely incorrect: Antique artistic candle holders.

Travis: Plenty of people do. It's actually still the most efficient form of constant heating for cold places. Boilers only rely on fuel and oil or water to run through the pipes, no fans, motors or air filters needed in the maintenance of an AC/Heater unit. I personally prefer the use of radiators as opposed to blowing air units and my house in Chicago has a full boiler system. Heating is cheap compared to electric methods.

I'm almost convinced the dog was having a partial seizure of the hind leg. Watch for the throbbing motion of the leg. It's not normal. Some epileptic animals respond in fear when they feel the muscle tension that comes along with having a seizure.