I rarely do composite images, but here's one. The eye and the skull were taken with the Optio S, the acherontia atropos (Death's Head Hawkmoth) pic was taken some years ago with Casio QV-4000. Oh, and the actual skull in the image belonged to some viking, that passed away some 1000 years ago...

Here's some Friedrich Nietzsche as a literary reference to the image:
"Whoever fights monsters should see to it that in the process he does not become a monster. And if you gaze long enough into an abyss, the abyss will gaze back into you."