Thank you for sharing this new experience. After this time the "general term rewriting" appears (in a universal manner) be a way to rediscover all the sciences. Every science as"computer science, mathematics, physics" and also cooking (probably the mother of all sciences) is a new art of digesting raw stuffs.
I already knew the connection between the "Actor model" and the "closure" concept (from the very classic paper "Lambda the ultimate" at http://repository.readscheme.org/ftp/papers/ai-lab-pubs/AIM-379.pdf) Today I discovered a link between "Actor model" and physics ("According to Carl Hewitt, unlike previous models of computation, the Actor model was inspired by physics including general relativity and quantum mechanics" at http://en.wikipedia.org/wiki/Actor_model) I regret that a physicist was not present to ask something "I wanted to know (but too afraid to ask)". Where was Brian Beckman ?