Trefoils and general mathematical knot theory can be discussed / pictures here.
Spex, I woud be glad to respond to your question except that there is an atheist prowling these boards. This very deranged individual would abuse any information he could access.
I will give you one hint, however: "Topological event."
Other people asked questions on similar topics, check out the answers they received:
Other people asked questions on various topics, and are still waiting for answer. Would be great if you can take a sec and answer them