The best “you can’t parse Aitch Tea Em Ell with regex, have you considered using a parser?” screed ever written: http://stackoverflow.com/questions/1732348/regex-match-open-tags-except-xhtml-self-contained-tags/1732454#1732454
[…] HTML tags lea͠ki̧n͘g fr̶ǫm ̡yo͟ur eye͢s̸ ̛l̕ik͏e liquid pain […]
is just effing brilliant.