User blog comment:Sadofreedomist/But alas, I died instantly./@comment-4017639-20110603055036

It seems as though you can edit your sig by going into your Profile and highlighting your avatar before clicking on the 2Change Avatar" option which will appear. Regarding the meme question, I'd say it's less funny then "and then a skeleton popped out" and it comes across as too nonsensical to work more then once or twice.