Last night i was riding up a hill when i heard spokes 'tinging'. I thought it was because i was pouring so many watts into them. I pulled over when it was safe to do so and checked each spoke to make sure i hadn't broken any. They were fine and i didn't notice anything out of the ordinary. Then sometime later in my commute, quite later, something got sucked into my spokes and i had to stop quick. This is what i found:
The coiled part was wrapped around the axle right between the dropout and the wheel. It was coiled tightly i uncoiled it removing it. The long part had been sucked into the spokes.
It is fairly thick metal slightly thicker than coat hanger wire and somewhat more malleable. What it is, and how on earth it got into my spokes is a complete mystery to me.