I kind of did this in a less traditional sense. Its reminiscent of Shakespearean masks next to one another but instead its an aggressive, strong willed face with a hysterical crying face. Actually I am quite surprised I don't see more variety in opposites in people's interpretations.
Okay, what can I say here.. I got inspired but watching one of the matches on JapaneseBugFights.com - the one where the giant ant-looking insect continuously gnaws at a scorpion's neck with its pincers until it is dead.