Ambigrams

Ever heard of them? An ambigram is a form of lettering in which a word or phrase can be read in more than one direction. Or it may be two words combined into one image in which only one can be seen at a time. I suppose the word could come from the root of 'ambiguous'? The master of this art is John Langdon.

I'm already trying to work out where to get one of these tattooed. What with my new obesession with Capoeira I've been spending lots of time upside down lately, which should show it off nicely.