12/29/06 Gil's LotD
http://en.wikipedia.org/wiki/Parallel_Postulate The parallel postulate says that if two angles are parallel to each other (or if they interset a 3rd line at the same angle) they will never interset and is part of the proof behind a lot of geometery.
http://www.youtube.com/watch?v=lmA9yb7_JVI A 1000+ man game of Capture the Flag in Toronto.