I reccomend watching part 1 as well but part 2 is all about emulsions. Take no credit for this of course but i found it useful in why emulsions happen. Give it a watch!
http://www.youtube.com/w...BYmY&feature=relatedNo drug, not even alcohol, causes the fundamental ills of society. If we're looking for the source of our troubles, we shouldn't test people for drugs, we should test them for stupidity, ignorance, greed and love of power. ~P.J. O'Rourke