i have heard that you can place an egg in a small wire pyramid and leave it - unrefrigerated for up to 2 weeks and it will not go bad
also , those trays that melt frozen food super fast (sold in infomercials then stores in the early 90's) are supposed to have hundreds of tiny pyramid shapes underneath the flat surface. which is why they can be cold and still thaw food , or melt an icecube faster than normal.
i did a google search and came up with a very interesting web page. the first part seems a bit far fetched , but the second was very interesting.
linkhere is the pic from the site. its a tesla coil placed inside a pyramid and put in a dark room. the exposure was somewhere between 1 and 3 minutes
i had to reduce its size greatly. see the site for a better pic