Check it out, ticker CYTC.OB [more]
Is it a bone? Is it coral? No -- it's BioCoral (BCRA.OB)!
Apparently these folks in France are making bone graft materials derived from coral. They've got a rinky-dink website telling you all about it. Little in the way of assets or revenues, and yet a big old market cap north of $400 million. Bombs away.