Reminds me of an injury sustained by the sister of a woman I used to work with.
One of her favourite tricks was in winter after cooking toast under the grill she'd turn the grill off and put her shoes upside down under the grill to warm them and then have nice cosy feet whilst waiting at the bus stop.
One day she forgot to turn the grill off, put the shoes under, then a few minutes later grabbed at two lumps of what appeared to be soles but was actually molten gloop that promptly caused serious burns to her hands.
Anyways, back on thread, what an awesome idea as someone with a left foot half a size smaller than the right I will be look out for some of these shoes and my shoes will be going in the oven the next time swmbo is out.