Certainly some interesting examples here, especially considering we now have examples at the Serapeum of some kind of granite melting liquid dripping over the edge of the granite box lids. So I am willing to consider this idea -
http://www.youtube.com/watch?v=A7xBwGNLnpo
http://www.youtube.com/watch?v=A7xBwGNLnpo (http://www.youtube.com/watch?v=A7xBwGNLnpo)