I finished Angels and Demons by Dan Brown, and needless to say I am now fascinated by ambigrams.
So, I decided to try to make an ambigram of my first name. An ambigram spells a word viewed normally and when rotated 180 degrees.
As it turns out, it took me around 30 minutes of various sketches. I'm lucky that "Karl" ambigrams fairly easily:
I might try to work up an ambigram including my last name - that is certain to be more difficult!