What's the Weirdest Material You've Ever Tied a Fly With?

weirdfly

Combing through some of my recent photo edits I came across the this image of a "crab/shrimp" fly for redfish or trout. It's a fly tied by a gentleman I met in Texas named Greg Corbett while on a shoot.

It's tied with a very long ladies press-on nail. I believe it rides hook up and looks like it would slide across the bottom or vegetation very nicely. Now I'm not much of a tier, but the ingenuity with materials for this fly struck me as genius and reminded me of what my friends over at pig farm ink are doing with their Iron Fly tying nights and strange fly tying materials.

So I'm curious: what's the weirdest tying material you've ever used?