In this morning's paper:
Wildcats chip away at Trojans' Achilles heelThere are so many ways in which this high-school football headline goes wrong. Wildcats don't use chisels. (Gnaw, though gruesome, would be an apt metaphor.) The body part in question is the Achilles' heel. And there's an unintentional (I think it's unintentional, given the rest of headline) comedy in the idea of the Trojans, their city ultimately destroyed by Achilles' fellow Achaeans, having an Achilles' heel.
This headline, as we would say in the heartland, "needs revised."