WTH is this that just fell out of my /6?!

Interesting. I like that answer better than it being something in the valve train LOL

My charcoal canister is hooked up. As a matter of fact, I just replaced the filter in the bottom of it today. And, I also put on a new PCV valve, and replaced the hose that goes from the PCV valve to a plastic T, and the hose that goes from that T to the charcoal canister. On the other side of that T is another hose.
Seems unlikely to me that it would have been in any of those hoses. I haven't disturbed anything else. I haven't disturbed anything that goes back to the fuel tank though.

???